QDMPPR51SE300

INSTRUCTION BOOK SE300 User Guide CONTENTS Package Contents Product Overview Power Management Charging Connections Firmware Updates 02 03 05 06 07 12 Getting Started _01 Basic Operations Home Screen Menu Category Screen Main Menu Screen Music Player Screen Notification Bar Using Open APP Service AK CONNECT AK File Drop Listening to Music Playlist Management ReplayGain USB DAC Installation How to Use USB Audio CD Ripping AK CD-Player Car Mode Bookmark Function Favorites Function Settings Connecting to Wi-Fi Using Bluetooth Equalizer Setup Using the Device _02 Precautions Troubleshooting Copyright Certifications Registered Trademarks Disclaimers Specifications 13 17 18 20 21 24 27 28 33 35 38 41 42 43 44 46 47 48 49 50 58 59 62 64 66 67 68 70 71 72 Miscellaneous _03 User Guide Contents may be changed without prior notice to improve the performance or quality of the product. Package Contents Getting Started 02 Leather Case & Protective Film: Protect the device and its screen. microSD Card Slot Cover: The cover is used to protect the microSD card slot when not in use. It is installed in the product by default. USB Type-C Cable: Please use a separate conversion adapter when connecting to a PC that cannot connect Type C. (Conversion adapters are not included in the component.) Quick Start Guide: Basic overview of device functionality. Warranty Card: Provides warranty details for your device. Maintain a copy of this card as it may be required for future technical support requests. User Guide: The User Guide can be downloaded from the Astell&Kern website. [http://www.astellnkern.com > Support > Download] Quick Start Guide & Warranty Card USB Type-C CablemicroSD Card Slot Cover SE300Leather Case & Protective Film Getting Started 03 User Guide The appearance of the product, as well as the printed and engraved information, may vary depending on the model. Product Overview USB Type-C Port Previous/Rewind Play/Pause LCD Touchscreen 2.5mm Balanced Port 4.4mm Balanced Port Volume 3.5mm Unbalanced Port / OPTICAL OUT Terminal Power Home ButtonNext/Fast-Forward microSD Card Slot 4.4mm Balanced Port: - 4.4mm Balanced Port symbol. For audio output, connect earphones or headphones that utilize a 4.4mm jack. 2.5mm Balanced Port: - 2.5mm Balanced Port symbol. For audio output, connect earphones or headphones that utilize a 2.5mm jack. Power: - Power symbol. Short press - Turns the screen on or off. Press and hold - Turns the device on or off. Volume: Turn the wheel to adjust the playback output volume level. 3.5mm Unbalanced Port / Optical Out Terminal: - 3.5mm Unbalanced / S/PDIF Port symbol. For audio output, connect earphones or headphones that utilize a 3.5mm jack. Music can be played back on a S/PDIF -capable external device via an optical cable. Previous/Rewind: Short press - Play the previous song or restart the current song. Press and hold - Rewind the current song. Play/Pause: Play or pause the current song. LCD Touchscreen: Display screen with touch control features. Next/Fast-Forward: Short press - Play the next song. Press and hold - Fast-forward the current song. Home Button: Press to return to the Home Screen. microSD Card Slot: - microSD Card Slot symbol. Insert a microSD card to access its files. USB Type-C Port: For charging and data transfer. User Guide Getting Started 04 Getting Started 05 User Guide Resetting the device will not affect stored data or time settings. Do not use the reset function while the product is in use. Doing so may corrupt the data on the device. This device has an automatic timeout feature to save battery power. The screen will turn off if there is no user input during the period defined in [Menu - Settings - Timer Settings - Screen Timeout]. (See Page 56) Reset Function 1. In case of unexpected device failure or freeze, press and hold [Power] for 7 seconds to force a shutdown. The device can then be restarted after the shutdown is complete. Turning the Screen On/Off 1. While the screen is on, press the [Power] button to turn off the screen. 2. Press [Power] button again to turn it on. This device has an automatic shutdown feature to save battery power. The device will turn off if there is no user input during the period defined in [Menu - Settings - Timer Settings - Auto Power Off] (See Page 56) Powering the Device On/Off 1. Press and hold the [Power] button to turn on the device. 2. While the device is on, press and hold the [Power] button to shut down the device. A confirmation message will appear. 3. Press [OK] to turn off the device. Power Manage- ment User Guide Getting Started 06 Charging via USB Wall Adapter 1. Commercially available 9V 1.67A output adapters may be used for charging. Charging Fast charging time: Approx. 3.5 hours (Fully discharged, Power-off, 9V 1.67A adapter) / Normal charging: Approx. 5.5 hours (Fully discharged, Power-off, 5V 2A adapter) The manufacturer shall not be responsible for problems caused by the use of adapters that do not adhere to the recommended specifications. Getting Started 07 User Guide Connec- tions 3.5mm Unbalanced Port 1. Connect earphones or headphones to the 3.5mm unbalanced port. OR 2.5/4.4mm Balanced Port 1. Connect earphones or headphones that support a 2.5mm or 4.4mm headphone jack to the 2.5mm or 4.4mm balanced port. OR Getting Started 08 User Guide Connecting to a Computer 1. Turn on the device and your computer. 2. Use the USB Type-C cable to connect the device to a computer in accordance with settings in [Menu - Settings - USB Mode]. [Default] Media Device (USB Drive): Transfer files from a computer to the device. DAC Input: Listen to music on a connected computer through the device. (See Page 42) Mac users need to download and install Android File Transfer from the Astell&Kern website. [http://www.astellnkern.com > Support > Download] For an optimal connection, quit any unnecessary programs before connecting the device to the computer. Do not use cables other than the USB Type-C cable provided with the device. …

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Using the Device 20 User Guide 3 1 2 4 5 Enable/disable AK Connect and set the library and speaker options. View the service app list and install /run apps. Set the EQ, Power, and more. Close the menu list and display the previous screen. Show various settings menus. AK CONNECT Services Key Settings Close Menu Settings 1 2 3 4 5 Main Menu Screen Using the Device 21 User Guide Music Player Screen Return to the previous screen. Displays album cover of current song. Tap image to view the song lyrics. Displays the artist info. Song title information. File name is displayed when the title is unavailable. Add or remove song from Favorites. Display the current play time. Previous Album Cover Artist Title Favorites Current Play Time 1 2 3 4 5 6 2 5 1 9 11 12 13 15 8 14 16 10 17 3 4 7 6 Using the Device 22 User Guide Press [ ] to set the Repeat mode. : Repeat entire playlist. : Repeat current track. : Repeat mode off. Short press: Play the previous song or restart the current song. Press and hold: Rewind the current song. Display the current playlist. Displays the mode according to the R-2R DAC option selection. Displays the bit rate and sampling frequency data. Go to the More menu for the current song. Add to Playlist: Add the current song to the playlist Go to Album: Go to the album that contains the current song Go to Artist: Go to the artist menu for the current song Go to Folder: Go to the folder that contains the current song File Info: Display current song information Shows the current track playback progress. Drag the Playback Progress Bar to move to the desired track time. Repeat Mode Previous/ Rewind Now Playing Display NOS/OS mode Format Information More Playback Progress Bar 7 8 9 10 11 12 13 Using the Device 23 Indicates the song’s total duration. Press to switch from elapsed time to remaining time. Press [ ] to set track sequence for playback. : Shuffle mode on. : Shuffle mode off. User Guide Song Duration Shuffle Mode 14 15 Short press: Play the next song. Press and hold: Fast-forward the current song. Play or pause the current song. Next/FF Play/Pause 16 17 Using the Device 24 User Guide Notifi- cation Bar 14 15 1234567981011121314 Using the Device 25 Press [ ] to turn Wi-Fi on/off. Press [ ] to turn Bluetooth on/off. You can change the mode provided by the R-2R DAC option. You can change the AMP class to A or AB. Press [ ] to turn the EQ on/ off. The most recent EQ settings are applied by default. Turn Crossfeed on or off and select the Crossfeed options. Press [ ] to turn AK Connect on/off. Press [ ] to turn Gapless Playback on/off. Press [ ] to turn ReplayGain on/off. When enabled, a uniform volume level will be applied. Press [ ] to turn line-out on/off. Wirelessly upload or download files to and from devices on the same network (PC, tablet, smartphone, etc.) using the SE300 via an FTP program. Press [ ] to turn Car Mode on/off. User Guide Wi-Fi Bluetooth Change NOS /OS mode Change AMP Class EQ Crossfeed AK CONNECT Gapless Playback ReplayGain Line-out AK File Drop Car Mode 1 2 3 4 5 6 7 8 9 10 11 12 Using the Device 26 Long-press an icon [ / / / / / / / / ] to navigate to the corresponding full settings menu screen. User Guide Press [ ] to turn Wheel lock on/off. When turned on, the volume wheel will be disabled when the screen is locked. Press [ ] to display the full settings menu. Use the adjustment bar to control the display brightness. Device notifications are displayed in this area. Wheel Lock Settings Brightness Notifications Display 13 14 15 16 Using the Device 27 User Guide The Open APP Service enables the user to install specific APK music streaming apps to the device. You can download the desired APK from the Service menu. Using Open APP Service The source of the app you are trying to install is unknown. Be aware that if the app is installed, the device may be damaged and personal data compromised. Depending on the APP, some functions may not work. Restrictions may apply to the use of the open app that can be installed and used for each product due to S/W version, etc. This is not a product issue, and cannot be a reason for refund or exchange. If you install an app from an unknown source, despite this warning, the company is not responsible for any damages to the device and data resulting from the app’s installation, and downloading and installing such apps may limit the scope of after-sales services provided under the manufacturer warranty. For more information and full instructions on how to install music streaming services, please visit the Astell&Kern website [http://www.astellnkern.com > Support > FAQ > Using Open APP Service]. Using the Device 28 User Guide Access and play back music files stored on a computer, NAS drive or AK Device on the same network, as well as output sound through compatible speakers with AK Connect. AK Connect is available on your AK device and also available as an app for your smartphone or tablet via Apple’s App store or Google Play Store. AK CONNECT Using AK Connect to Link Music Libraries/Speakers 1. Turn on the music library device and/or speaker and AK player. 2. Connect all devices to the same Wi-Fi network. 3. Turn on the AK CONNECT feature by pressing and holding [ ] in the Notification Bar or selecting [Menu- Settings-AK CONNECT]. 4. Select the library or speaker to use. 5. A list of libraries / speakers that are on the same network with the AK player will be displayed. 6. Select a library / speaker to connect. Using the Device 29 User Guide For Wi-Fi connections, see Page 58. Tap the [ ] button at the top left of the screen while connecting to the speaker to cancel the connection. 7. After selecting a library / speaker, select a category from the menu to display the corresponding music list. Using the Device 30 User Guide Streaming Music from Your Library 1. Select a category from the library menu to see your list of music. 2. Select a song to begin streaming. Downloading Music from Your Library 1. Select a category from the li…

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Using the Device 40 1. Press [Playlists] to view the playlists, then press [ ]. 2. Select the playlist to be deleted. 3. Press [ ] at the top of the screen. 4. Press [DELETE] to delete the selected playlist. 1. Press [Playlists] to view the playlists, then press [ ]. 2. Select a playlist to be renamed. 3. Press [ ] at the top of the screen to display the RENAME window. 4. Enter a name for the playlist and then press [RENAME] to confirm the change. User Guide Renaming a Playlist Deleting a Playlist Using the Device 41 User Guide Replay Gain Calibrate Loudness 1. Select [ ] at the top of the music list. 2. Select the desired music from the music list, then press [ ] at the top to start the calibration process. 3. [ ] will be displayed for the songs that have been calibrated in the playlist. 4. ReplayGain can be turned on/off by clicking [ ] on the notification bar screen or in [Menu-Settings- ReplayGain]. You can calibrate the loudness in the Albums, Playlists, or Folders menu. ReplayGain is only supported on 24bit/192kHz or lower formats. SE300_Contents SE300_Contents Using the Device 42 User Guide Playback is unavailable when settings exceed the supported formats. The Previous, Play, and Next buttons are unavailable when connected as a USB DAC. Playback may stutter when computer performance is slow or the USB connection is experiencing heavy usage. There may be issues with audio-to-video synchronization during video playback depending on the sound quality and operating environment. Volume cannot be adjusted via the Windows volume control. The volume wheel on the device or volume control on the appropriate program must be used to adjust the volume. Install a dedicated driver to use the AK device as a USB DAC. The driver file is located in SE300\Internal_Storage\SE300_ Contents\Driver. USB DAC Installation The USB DAC function allows the device to be recognized as a sound card on a computer. Music from the computer is played through the device’s headphone port for an enhanced listening experience. USB DAC Specifications Supported OS Windows 10/11 (32/64bit) MAC OS 10.7(Lion) or later USB DAC Support Specifications Supported Formats: PCM [8~384kHz(8/16/24/32bit)] DSD [2.8/5.6MHz] Control the volume with the AK device’s volume wheel. Using the Device 43 User Guide How to Use USB Audio Connect the device to a portable amp or DAC using USB Audio Out. How to Connect a Portable USB DAC 1. Connect the portable USB DAC to the AK device’s USB Type-C port with a dedicated cable. 2. Check the connected messages in the Notifications Display. 3. After connection, the function is automatically enabled, allowing you to listen to music through the portable USB DAC’s audio output jack. How to Change USB Audio DSD Output Type You can change the type of DSD data that is outputted through the USB audio out. 1. Select a DSD output type in [Menu - Settings - USB Audio]. PCM : DSD audio is converted into PCM before being outputted through the USB audio out. DoP : DSD audio is converted into DoP before being outputted through the USB audio out. MQA : Optional activation of S/W MQA decoding. Options may differ depending on the connected external device. Please refer to the specifications of each device. The USB Type-C cable that comes packaged with the device is only to be used for computer data transfer or to charge the device. The type of dedicated cable needed to connect to the portable DAC varies; please refer to USB DAC manufacturer instructions for correct cable type. A USB DAC cable is not included with the device and must be purchased separately. Depending on the OTG cable used, the connection may be unstable. When a USB connection is established while playing a DSD or DXD file, a mode selection pop-up box will appear with the following options: External device connection: Connect the player to the computer to transfer files, USB DAC for audio playback or CD Ripper connection. Charge device: Charge the device. Using the Device 44 User Guide The portable USB DAC must be able to receive digital input through the micro-USB's OTG. Audio output may vary widely depending on the digital input specs of the portable USB DAC used. This is not a defect in the device output and not a reason for exchange or refund. When using DoP as a DSD output type, no sound may be outputted except noise depending on the portable USB DAC. CD Ripping CDs can be ripped directly to the device using the AK CD- RIPPER (sold separately). Connecting the AK CD-RIPPER 1. Connecting the Type-C USB Port of SE300 and the AK CD ripper with a dedicated cable allows you to select the function you want to use on the Notifications Display. 2. When a function is automatically selected in the settings, the function will be executed. Automatically select the CD ripper function. 1. Select the function to automatically execute in [Menu- Settings-CD Ripper-Default run]. 2. Select the [CD Player] / [CD Ripping] function. 3. When [Ask every time] is selected, the function selection popup will be displayed each time a CD is inserted. The USB Type-C cable provided with the device is to be used to connect to the computer or to charge the product. Depending on the CD-Ripper model the dedicated USB Type-C OTG cable may not be provided in the product package. Depending on the OTG cable used, the connection may be unstable. When a USB connection is established while playing a DSD or DXD file, a mode selection pop-up box will appear with the following options: External device connection: Connect the player to the computer to transfer files, USB DAC for audio playback or CD Ripper connection. Charge device: Charge the device. Using the Device 45 User Guide CD Ripping Results : Indicates that CD ripping is complete, or that CD ripping was successfully completed after correcting an error via error correction. : Indicates that the song currently being ripped can be canceled by user. : Indicates that CD ripping failed due to an error that can’t be corrected, such as a sc…

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Using the Device 56 User Guide Downloads Select a folder for downloaded files to be saved by default. Update System Update: Update the device when a new firmware version is available. Application Update: Update the default applications when new versions are available. Automatic updates for Open APP applications are not available through the Settings Menu of the device. When using AK Connect to download music, if the [Default folder] is selected in Settings, downloading will automatically begin to the pre-set Downloads folder. When [Select Folder] is selected, the user is prompted to choose a download folder each time a file is downloaded. Timer Settings Auto Power Off: The device will automatically power off after the selected amount of time of no user and device activity. Screen Timeout: The screen will turn off after the selected amount of time of no user activity. Sleep Timer: After a set amount of time, playback will stop, and the device will turn off according to the time set in [Auto Power Off]. Using the Device 57 User Guide System Information System Information: View model number, firmware version, MAC address and memory usage information. The microSD card can be mounted/dismounted and data can be deleted. Legal information: Check open source licenses and regulations. Formatting the microSD card will delete all data on the memory card. Be sure to backup any important files before formatting. When formatting the microSD card on a computer, use of the FAT32 system is recommended. System Reset Initialize Media Scan: Resets and rescans the internal database. Database initialization time may vary depending on the number of files stored on the device. Settings Reset: Resets all user settings back to the default settings. Factory Data Reset: Deletes all user data and resets all user settings back to the default setting. Using the Device 58 User Guide Connecting to Wi-Fi 2. Select the desired AP to connect to the wireless network. Additional information such as Wi-Fi password may be required depending on Wi-Fi settings. Connecting to a Wi-Fi Network 1. Press and hold [ ] from the Notification Bar or select [Menu - Settings - Wi-Fi] to display a list of available Wi-Fi networks. Networks requiring browser or other additional certifications are not supported. Wi-Fi Channels 1 through 13 supported, except in the USA, channels 12 and 13 are disabled. Using the Device 59 User Guide Using Bluetooth Configures two-way Bluetooth (RX/TX) to listen to music wirelessly using a device that supports Bluetooth. Turning Bluetooth On/Off A Bluetooth device must be paired with the device prior to use. Refer to the Bluetooth device's instruction manual for details. 1. Select [ ] from the Notification Bar menu or select [On/Off] from [Menu - Settings - Bluetooth]. Bluetooth Pairing 1. In the Settings Menu, select the appropriate Bluetooth device from the list of available devices. Disconnect a Bluetooth Device 1. Press the connected Bluetooth device and confirm the message prompt to disconnect the device. Using the Device 60 User Guide Removing a Bluetooth Pairing 1. Press [ ] to the right of the paired device to go to settings. 2. Select [Remove] to complete the process. Using Bluetooth Sink Mode Similar to connecting to a Bluetooth speaker from a smartphone, music being played on an external device can be played on the SE300 by connecting to the SE300 from the external device. 1. Enable Bluetooth Sink Mode. 2. Search for and connect to the SE300 from the Bluetooth menu of the external device. SOURCE DEVICESE300 OR BLUETOOTH SPEAKERDEVICE Using the Device 61 User Guide 3. Music will be outputted through the SE300 when played on the connected device. When Bluetooth Sink Mode is enabled, any device currently connected will be disconnected. The Bluetooth codec can be set on the source device playing music. Bluetooth Support Specifications Profile: A2DP, AVRCP Supported Codecs: Qualcomm® aptX™ HD, LDAC, AAC, SBC Device performance may be affected during Hi-Res playback. Do not turn off the device while connected to Bluetooth. Turn the Bluetooth device off then on in case of issue. Pairing methods may differ for each individual Bluetooth device. Always refer to the respective instruction manual for details. When connecting the product to a Bluetooth device, the distance between the two must be within 20 cm. Audio quality will degrade with longer distances and the pairing may disconnect at a distance of 2 m (6.5 ft.) or more. (Distances may vary depending on device and environment.) Crosstalk may be heard while using Bluetooth. For multipoint devices, make the necessary connections prior to use. Malfunction, noise, and other undesirable effects may occur due to the device's battery level and the environment. If signal interference affects data transmission. (e.g., holding the device while wearing a Bluetooth device, holding the device while holding another electronic device, etc.) If the device or Bluetooth headset's radio transmitters are touching parts of the body. If the transmission strength is affected by walls, corners, partitions, etc. If devices using the same frequencies cause interference. (e.g., medical devices, microwave ovens, Wi-Fi, etc.) Areas with an excessive amount of interference or weak signals. (e.g., elevators, underground, etc.) Using the Device 62 User Guide 3. Enter a name for the custom EQ settings and select [SAVE]. Equalizer Setup 1. Press and hold [ ] on the Notification Bar or turn on [Menu - Settings - Equalizer]. 2. Press [Normal EQ], then select [+]. Equalizer Setup Using the Device 63 User Guide 4. Adjust the frequencies up and down according to the user's preferences. 5. The number values at the lower- left corner of the screen can be adjusted for fine-tuning. 6. Press the [Advanced] tab on the top to display PEQ settings screen. Adjust Freq/Gain/Q. Miscellaneous 64 User Guide Pre Cautions Device When a plug is inserted into the unbalanced, balanced, or USB port, do not apply …

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Attestation Statements Date: April 18, 2023 TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA RE: Attestation Statements Part 2.911(d)(7) request for QDMPPR51 DREAMUS COMPANY, the undersigned, hereby authorize Invixion Inc. to act as our designated U.S. agent for service of process, DREAMUS COMPANY accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Invixion Inc. accepts the responsibility to act as designated U.S. agent for service of process, provides an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Applicant Information： Company name: DREAMUS COMPANY Contact Name: JeongHoon, Yu Address: 311, Gangnam-daero, Seocho-gu, Seoul, Republic of Korea Telephone No: 82-2-6240-9118 Email: [email protected] U.S. Agent Information: Company Name: Invixion Inc. Address: 19600 Fairchild, #125, Irvine CA 92612 FRN Number: 0033404864 Contact Name: Owen Kwon Telephone No: (949) 336-4535 Email: [email protected] Applicant Signature: Agent Signature: (if the agent is different from the applicant) Applicant printed name: JeongHoon, Yu Agent printed name: Owen Kwon

DREAMUS COMPANY Date: April 18, 2023 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for QDMPPR51 [DREAMUS COMPANY] (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Sincerely, (Applicant signature) (Applicant printed name) JeongHoon, Yu DREAMUS COMPANY Date: April 18, 2023 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for QDMPPR51 [DREAMUS COMPANY] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name) JeongHoon, Yu

DREAMUS COMPANY 311, Gangnam-daero, Seocho-gu, Seoul, Republic of Korea Date: April 18, 2023 Eu rofins Electrical and Electro nic Testing NA, Inc. 914 Wes t Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (SE300 / PPR51 # QDMPPR51 #) To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47 . We have requested that the (below list) required to be submitted with this application be permanently withheld from public review. Permanent Confidential Request -. Schematics -. Operational Description -. Block Diagram -. Part list -. U-NII Device SW Security Statement SPECIFY REASON FOR REQUEST (i.e. the above documents are compa ny proprietary information that could never get into the possession of y our competition). Please contact me if there is any information you may need. Sincerely, JeongHoon, Yu / Manager

DREAMUS COMPANY 311, Gangnam-daero, Seocho-gu, Seoul, Republic of Korea Date: April 18, 2023 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (SE300 / PPR51 # QDMPPR51 #) To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the (below list) required to be submitted with this application be short-term Confidentiality for a period of 180 days after grant is issued. Short-Term Confidential Request -. External Photos -. Internal Photos -. Test set-up photo -. User Manual SPECIFY REASON FOR REQUEST (i.e. These documents contain detailed system and equipment descriptions and related information about the product, which we considers to be proprietary, confidential, and a custom design and otherwise, would not release to the general public. Since this design is a basis from which future technological products will evolve, we feel that this information would be of benefit to our competitors, and that the disclosure of the information in these documents would give our competitors an unfair advantage in the market. Please contact me if there is any information you may need. Sincerely, JeongHoon, Yu / Manager

DREAMUS COMPANY 311, Gangnam-daero, Seocho-gu, Seoul, Republic of Korea Date: April 18, 2023 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Ms. Chloe Lee/Deputy General Manager of Eurofins KCTL Co.,Ltd. to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, JeongHoon, Yu / Manager

This document shall not be reproduced, except in full, without the written approval External photos of EUT This document shall not be reproduced, except in full, without the written approval This document shall not be reproduced, except in full, without the written approval This document shall not be reproduced, except in full, without the written approval

Eurofins KCTL Co.,Ltd. 65, Sinwon-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 16677, Korea TEL: 82-70-5008-1021 FAX: 82-505-299-8311 www.kctl.co.kr Report No.: KR23-SPF0010 Page (70) of (75) This test report shall not be reproduced, except in full, without the wri…

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