2BX9F-H1Integrated High-resolution Music Streamer and DAC

Copyright 2026 Thunder Da ta Co., Ltd. Quick S tart Guide Silent Ang el H1 Int egrated High-resolution Music Streamer and DAC Thank y ou for choosing the Silent Angel H1 All-in-One Digital Streamer & DAC. Y ou may contact us via the methods below for prompt support services. www.silentangel.com Scan the QR code above to install the VitOS Orbiter app on your smartphone or tablet. S TART EXPLORING... PRODUC T OVERVIEW BASIC OPERATION SYSTEM SETTINGS Precautions Before Use Interface Description Main Interface Guide APP Download Network Connection Music Streaming Network Storage USB Storage My Favorites Language Settings Service Account Management Analog & Digital Output Settings USB Audio Output Settings AP Mode Settings Display Settings System Upgrade Album Management I/O Connection Settings Rear Panel Wiring Diagram Specifications Pr ecautions for Product Use Ser vice About This Manual Plac ement P ower Supply Mois ture Prevention The Silent Ang el H1 is equipped with a comprehensive range of audio input/output interfaces and data transmission interfaces. Please refer to this manual for details. 9 12 11 10 87 Int erface Description F ront Panel Rear Panel Volume Knob V OLUME RGB LED Display Short pr ess: Mute/Unmute Rotate: Volume adjustment Notice: Volume Knob Press and hold the volume knob for 5 seconds to enter AP configuration mode. Refer to this manual for detailed AP network configuration instruc- tions. S SD Storage Bay P ower Switch T urns the player on and off. A C IN Connec t the AC power cord TF F or installing the system TF card U SB3.0 Audio Port: Support s connection to external USB storage devices, external DACs and other peripherals. U SB3.0 Audio Port: Support s connection to external USB storage devices, external DACs and other peripherals. T ype-C Port (USB 2.0): F or connecting external DAC devices. Op tical Interface: Support s PCM up to 24Bit/192kHz; DSD audio is supported via D2P and DOP encapsulation. RESET R estart the unit RCA L and RCA R: Unb alanced RCA audio output connectors for left channel and right channel. U SB-B Port: U SB audio input for connecting mobile phones, computers and other devices; maximum support for DSD512 and PCM 768kHz/32bit. E thernet Port: 1Gbps Gig abit Ethernet XLR -L & XLR-R: Balanc ed XLR audio output interfaces for left channel and right channel respectively. 2. Flip open the S SD locking buckle, insert the prepared solid-state drive into the interface, press the buckle to secure the SSD firmly, then reinstall the hard drive cover. Notes: No tes: The diagr am only illustrates partial device connections; more devices can be connected in actual use. PC Mobile s torage / PCAV amplifier / speakers AC three-prong power cord Mobile storage / Decoder AV amplifier / Decoder Ethernet cable S SD Installation Procedure Rear Panel Wiring Diagram Specific ations XLR A udio Output Characteristics Output Level (Vrms): 4.5 Vrms (Bandwidth: 20 Hz~20 kHz) Total Harmonic Distortion plus Noise (THD+N): ＜0.00008% @ 1 kHz (-121 dB @ 1 kHz) Noise Floor: ＜1.7 μVrms Signal-to-Noise Ratio (SNR): 129 dB @ 1 kHz Frequency Response: 20 Hz‒20 kHz (±0.07 dB) Channel Separation (Crosstalk): -120 dB Dynamic Range (DNR): 129 dB @ 1 kHz RCA Audio Output Characteristics Output Level (Vrms): 2.5 Vrms (Bandwidth: 20 Hz~20 kHz) Total Harmonic Distortion plus Noise (THD+N): ＜0.0001% @ 1 kHz (-118 dB @ 1 kHz) Noise Floor: ＜1.5 μVrms Signal-to-Noise Ratio (SNR): 126 dB @ 1 kHz Frequency Response: 20 Hz~20 kHz (+0.06 dB) Channel Separation (Crosstalk): -120 dB Dynamic Range (DNR): 126 dB @ 1 kHz Control Method Supports control via dedicated APP on mobile phones and tablets running Android and iOS systems; the APP enables full-function operation of the player. Power InputAC 110‒120 V~/AC 220‒240 V~, 50/60 Hz Rated Power Consumption 25 W Overall Dimensions280*220*77.7mm USB-AUDIO Audio OutputMax support PCM 32Bit/768kHz, DSD256; DSD audio can be output in D2P and DOP modes. USB-C Audio Output Max support PCM 32Bit/768kHz and DSD256; DSD signals can be output via D2P and DOP modes. OPT Optical Audio OutputMax support PCM 24Bit/192kHz; DSD can be output in D2P and DOP modes. Pr oduct NameIntegrated Digital Music Player & Decoder ModelSilent Angel H1 ColorBlack Body Material Aerospace-grade full aluminum chassis with matte blasting process consistent with Apple’s finishing standard DisplayScreen Size: 5.5-inch non-touch screen. Resolution: 720×1280, landscape orientation Operating SystemLinux OS UI LanguageMulti-language selection available Chip SolutionCPU Model: RK3568 quad-core ARM Cortex-A55, maximum main frequency up to 2.0 GHz Memory ConfigurationDDR4: 4GB TF CardBuilt-in 32GB TF Card Audio DACDual ES9039Q2M Audio ProcessorXMOS XU316 3rd Generation, 16-core Operational Amplifier Chips 6 units of Silent Angel self-developed Kmuse + 2 units of OPA1612 Power SupplyHigh-quality low-ripple audiophile-grade power supply Hard Disk InterfaceM.2 (NVMe PCIe 3.0) interface Wired NetworkRJ-45 (1000M/100M/10Mbps) Wireless NetworkModel AP6275PR3, supports dual-band Wi-Fi (2.4GHz) File ManagementSupports automatic scanning of music files to generate albums; functions including favorites collection, custom playlists, album browsing and content search are available. Playback DisplaySupports display of lyrics, album covers and song metadata. Playback Settings Playback modes include sequential playback, shuffle play, single-track repeat and all-track repeat. Compatible with NAS and streaming servers. System SettingsAudio output configuration, language settings, advanced settings, device information USB-B Audio Input Supports DSD512 Native, PCM up to 768kHz/32bit System compatibility: Windows 7~11, macOS, Android, iOS, HarmonyOS Network Streaming & Audio Casting High-Resolution Audio (Beta), AirPlay 2, DLNA Renderer Built-in apps: Xianlai Premium version of QQ Music, Spotify Connect, TIDAL Connect, Internet Radio Music Playback & DAC Decoding DSD: Supports DSD64 to DSD256, compatible with DSF,…

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1/1 US Agent for Service of Process LETTER OF ATTESTATION TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 US Agent for Service of Process: Company Name: Herland International Trading Inc FRN: 0036324101 Contact Name: Jianfeng Gao Address: 1370 Valley Vista Dr Ste 200 Diamond Bar California 91765-3921 Telephone No: 001-909-772-1888 Email: [email protected] Applicant: Company name: Thunder Data (Shenzhen) Co., Ltd. Product Description: Integrated High-resolution Music Streamer and DAC Grantee code: 2BX9F FCC ID: 2BX9F-H1 FRN: 0038887303 Contact Name: Jack bu Address: Room 0501-0506, 0509, 0513-0518 Building 5A, Huaqiang Idea Park, Guangming Dist Shenzhen, Guangdong Province 518107 P.R. China Telephone No: 18906679427 Email: [email protected] [Thunder Data (Shenzhen) Co., Ltd.] certifies that, as of the date of this filing of the application with the TCB, [Herland International Trading Inc] is our designated US agent for service of process for the above referenced FCC ID. [Thunder Data (Shenzhen) Co., Ltd.] 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 equipment. [Herland International Trading Inc] accepts, as of the date of the filing of the application, the obligation of the designated US agent for service of process for the above reference FCC ID. The US Agent for Service of Process is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. The Applicant is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. Date: 2026/09/15 Applicant’s Name: Jack bu US Agent’s Name: Jianfeng Gao Title: Manager Title: Manager Signature Signature

Attestation Statement. Old Code: C5266091 24 New Code: 00015544 Ed.3 Change reason: FRN is added to the Applicant information section. 1/1 Thunder Data (Shenzhen) Co., Ltd. TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 The Commission adopted rules that prohibit equipment authorization for “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List 1 , which is periodically updated. See the Covered List for more details. This Attestation Statement is to confirm that we follow the Section 2.911(d)(5)(i)-(ii) Applicant Company name: Thunder Data (Shenzhen) Co., Ltd. Grantee code: 2BX9F FCC ID: 2BX9F-H1 FRN: 0038887303 Contact Name: Jack bu Address: Room 0501-0506, 0509, 0513-0518 Building 5A, Huaqiang Idea Park, Guangming Dist Shenzhen, Guangdong Province 518107 P.R. China Telephone No: 18906679427 Fax No: 18906679427 Email: [email protected] i. [Thunder Data (Shenzhen) Co., Ltd.] (“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. The applicant must sign this certification. ii. [Thunder Data (Shenzhen) Co., Ltd.] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant [is not] (as a specifically named entity or any of its subsidiaries or affiliates) identified on the Covered List as an entity producing “covered” equipment. The applicant must sign this certification. [Thunder Data (Shenzhen) Co., Ltd.] (“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 . Date: 2026/09/15 Applicant’s Name: Jack bu Title: Manager Signature: The Commission’s Covered List is published by the Public Safety and Homeland Security Bureau and posted on the Commission’s website. This Covered List, which is periodically updated, identifies particular equipment, produced by particular entities, that constitutes “covered” equipment. https://www.fcc.gov/supplychain/coveredlist

Thunder Data (Shenzhen) Co., Ltd. Code 00018768 Ed. 1 Item 1. The device is able to install software/program installation? ☐ Yes, go to Item 2. ☒ No. In this case, the rest of the items do not apply. The device cannot support installation of Kaspersky cybersecurity or anti-virus software. Item 2. Technical Requirements for Kaspersky Cybersecurity Software: # General Requirements (For all Devices) Yes / No or N/A Comments 1 Internet connection for activation and updates (For all Operating Systems) N/A Device Integrated High-resolution Music Streamer and DAC Company name Thunder Data (Shenzhen) Co., Ltd. Grantee code 2BX9F FCC ID 2BX9F-H1 FRN 0038887303 Contact name Jack bu Address Room 0501-0506, 0509, 0513-0518 Building 5A, Huaqiang Idea Park, Guangming Dist Shenzhen, Guangdong Province 518107 P.R. China Telephone number 18906679427 E-mail [email protected] Chipset/module information AP6275P Operating System (if applicable) N/A Storage Capacity (hard drive or other permanent memory storage, if applicable) N/A 2 # General Requirements (For Windows Devices) Yes / No or N/A Comments 1 Storage: 1500 MB free space on the hard drive N/A 2 Operating System: Microsoft Windows 8, 8.1, 10 & 11 Home / Pro / Enterprise Microsoft Windows 7 Starter / Home Basic & Premium / Professional / Ultimate SP1 or higher N/A 3 Processor: 1 GHz or higher (x86 or x64) N/A 4 Memory (RAM)1 GB (32-bit) or 2 GB (64-bit) N/A 5 Screen Resolution: Minimum resolution of 1024 x 768 N/A # General Requirements (For macOS devices) Yes / No or N/A Comments 1 Operating System macOS® 13 – 14 N/A 2 Memory (RAM)4 GB N/A 3 Storage: 3455 MB free space on the hard drive N/A # General Requirements (For Android Devices) Yes / No or N/A Comments 1 Storage: 150 MB free space N/A 2 Operating System: Android™ 10 – 14 N/A 3 Screen Resolution: Minimum resolution of 320 x 480 N/A # General Requirements (for iOS devices) Yes / No or N/A Comments 1 Storage: 150 MB free space N/A 2 Operating System: iOS® 17 N/A # General Requirements (For Linux system) Yes / No or N/A Comments 3 1 Hard drive: 1 GB of free space N/A 2 CPU: Intel Pentium 1 GHz or higher N/A 3 RAM: 1 GB N/A 4 Minimum software requirements: AlmaLinux OS 8 or later; AlterOS 7.5 or later; Astra Linux Common Edition 2.12 or later; CentOS 6.7 or later; Debian GNU/Linux 10.0 or later; EulerOS 2.0 or later; Oracle Linux 7.3 or later ; Red Hat Enterprise Linux 6.7 or later ; Rocky Linux 8.5 or later ; SUSE Linux Enterprise Server 12.5 or later; Ubuntu 12.04 or later ; Uncom OS Home / Business / Education / Enterprise 2.2 or later; ALT Linux Workstaton / Workstation K / Server / Education 8 or later; ROSA Linux Workstation / Server 12 or later ; RED OS 7.3 and later ; N/A After reviewed the technical requirements, is the device capable of supporting the installation of Kaspersky software? ☐ Yes, go to Item 3. ☒ No. In this case, the rest of the items do not apply. The device cannot support installation of Kaspersky software Item 3. Connectivity Capabilities: 4 # Physical Interface Purpose Justification 1 1 # Wireless Interface Purpose Justification 1 1 After the review of this items, the device: ☒ Cannot support installation of any cybersecurity or anti-virus software on the covered list. ☐ Potentially can operate with any cybersecurity or anti-virus software on the covered list – additional third- party proof is provided to demonstrate compliance with requirements as of 2.911(d)5(i),(ii) – “Proof of Compliance with Covered List Software Requirements” of this document applies Signature: Name: Jack bu Date:2026-09-15 1 The justification field is used to justify why the software cannot be received through that interface. Check the annex for more indications.

TCB CALL página 1 File FCC ID: 2BX9F-H1 Please upload an exhibit that explains how does the TCB verify the new agent information: 1- Is the address of the agent a valid physical US mailing address (not a US post office box, not a virtual mailbox, not P.O. Boxes, not a vacant lot, not a public building, etc.) ○ We have checked if the address exists in a real and potential building (Google maps) + official US register, after this verification and the evidence below we can guarantee the following: not a US post office box not a virtual mailbox not P.O. Boxes not a vacant lot not a public building(note) ► We checked the FCC FRN Search based on the information provided by the grantee. On the official register from : Search | California Secretary of State TCB CALL página 2 TCB CALL página 3 TCB CALL página 4 TCB CALL página 5 TCB CALL página 6 TCB CALL página 7 TCB CALL página 8 ► CONCLUSION by TCB: The ASOP defined and provided by grantee is VALID and confirmed. Therefore the exhibit "C5266091_X23_Ed1_US_Agent_Letter" included in the file is ok. 2- Is the agent physically located at that valid US address such that the agent can be legally served at that address? Yes , check above 3- Has the listed agent clearly agreed in writing to serve as the agent for the grantee at that address? Yes, it is included in the exhibit "C5266091_X23_Ed1_US_Agent_Letter" >

C5266091_X10_Ed.2 1/1 Thunder Data (Shenzhen) Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 2026.09.15 Subject: Request for Confidentiality FCC ID: 2BX9F-H1 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules (47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits Long-Term Confidentiality Short-Term Confidentiality NOTE 2 ID Label/Location No No Attestation Statement No No External Photos No ☐ Block Diagram ☒ ☐ Schematics ☒ ☐ Test Report No No Test Setup Photos No ☐ User’s Manual ☐ NOTE 1 ☐ Internal Photos ☐ NOTE 1 ☐ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ☒ ☐ Cover Letter(s) No No SDR Software / Security Info ☐ No NOTE 1: Long-Term Confidentiality may be permitted under special conditions (See II. LONG-TERM CONFIDENTIALITY, Section 3 of KDB 726920, use last in force) NOTE 2: Short-Term Confidentiality can be requested for a maximum of 180 days from the date of the grant. Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. In case of short-term Confidentiality, the applicant requests the exhibits selected above are withheld from public view for a period of ______ days from the date of the Grant of Equipment Authorization and prior to marketing. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Sincerely, C5266091_X10_Ed.2 1/1 Signature: Name: Jack bu Title: Manager 2026.09. 15

C5266091_X8_Ed.1 1/1 Letter of Authorization Thunder Data (Shenzhen) Co., Ltd. Company: Thunder Data (Shenzhen) Co., Ltd. Address: Room 0501-0506, 0509, 0513-0518 Building 5A, Huaqiang Idea Park, Guangming Dist Shenzhen, Guangdong Province 518107 P.R. China Product Name: Integrated High-resolution Music Streamer and DAC Model Number: H1 FCC Identifier: 2BX9F-H1 We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Jack bu Date: 2026.09.15 Title: Manager Signature of applicant:

Shenzhen DL Testing Technology Co., Ltd. EUT PHOTO(External Photos) Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. ANT 2 ANT 1 Shenzhen DL Testing Technology Co., Ltd. ※※※※※ END OF REPORT ※※※※※

Size: 32*16mm M/N: H1 FCC ID: 2BX9F-H1 Label location

Shenzhen DL Testing Technology Co., Ltd. EUT PHOTO(Internal Photos) Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. ※※※※※ END OF REPORT ※※※※※

FCC ID: 2BX9F-H1 RF Exposure Evaluation Limits KDB 447498 D01 General RF Exposure Guidance v06 FCC CFR 47 part2 2.1091: Radiofrequency radiation exposure evaluation: mobile devices The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) radiation as specified in 1.1307(b) Limits for Maximum Permissible Exposure (MPE) Frequency range (MHz) Electric field strength (V/m) Magnetic field strength (A/m) Power density (mW/cm 2 ) Averaging time (minutes) (A) Limits for Occupational/Controlled Exposures 0.3–3.0 614 1.63 *(100) 6 3.0–30 1842/f 4.89/f *(900/f 2 ) 6 30–300 61.4 0.163 1.0 6 300–1500 f/300 6 1500–100,000 5 6 (B) Limits for General Population/Uncontrolled Exposure 0.3–1.34 614 1.63 *(100) 30 1.34–30 824/f 2.19/f *(180/f 2 ) 30 30–300 27.5 0.073 0.2 30 300–1500 f/1500 30 1500–100,000 1.0 30 f = frequency in MHz Friis transmission formula: Pd = (Pout*G)/(4*pi*r 2 ) Where Pd = power density in mW/cm 2 , Pout = output power to antenna in mW; G = gain of antenna in linear scale, Pi = 3.1416; R = distance between observation point and center of the radiator in cm Pd id the limit of MPE, 1 mW/cm 2 . If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. Test Procedure Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. EIRP=EMeas+20log(dMeas)-104.7 EIRP is the equivalent isotropically radiated power, in dBm EMeas is the field strength of the emission at the measurement distance, in dBμV/m dMeas is the measurement distance, in m Test Result of RF Exposure Evaluation wifi 2.4Gmode: ANT1&ANT2 MIMO Channel Output power to antenna (dBm) Output power to antenna (mW) Power Density at R=20cm (mW/cm 2 ) Limit (mW/cm 2 ) Result Antenna1 Antenna2 Antenna1 Antenna2 Antenna1 Antenna2 802.11b 15.04 17.92 31.9154 61.9441 0.01258 0.02442 1.0 PASS 802.11g 14.99 15.31 31.5500 33.9625 0.01244 0.01339 1.0 PASS 802.11n20 14.53 14.93 28.3792 31.1172 0.02237 0.02453 1.0 PASS 802.11n40 13.40 14.87 21.8776 30.6902 0.01725 0.02420 1.0 PASS Remark: antenna gain=2.97dBi Directional Gain=1.96dBi+10log(2)=5.98dBi For Simultaneous transmitting, 1): The sum of the ratios of the spatially averaged results to the applicable frequency dependent MPE limits =0.02237/1 + 0.02453/1= 0.0469< 1 Since the sum of the MPE ratios for all simultaneously transmitting antennas incorporated in the device is ≤ 1.0, the EUT is considered to satisfy MPE compliance for simultaneous transmission operations.

Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-260824008R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 1 of 34 FCC Part 15C Test Report FCC ID: 2BX9F-H1 Applicant: Thunder Data (Shenzhen) Co., Ltd. Address: Room 0501-0506, 0509, 0513-0518 Building 5A, Huaqiang Idea Park, Guangming Dist Shenzhen, Guangdong Province 518107 P.R. China Manufacturer: Thunder Data (Shenzhen) Co., Ltd. Address: Room 0501-0506, 0509, 0513-0518 Building 5A, Huaqiang Idea Park, Guangming Dist Shenzhen, Guangdong Province 518107 P.R. China Product Name: Integrated High-resolution Music Streamer and DAC Trade Mark: Model Number: H1 Date of Receipt: Aug. 24, 2026 Test Date: Aug. 24, 2026 - Sep. 11, 2026 Date of Report: Sep. 11, 2026 Prepared By: Shenzhen DL Testing Technology Co., Ltd. Address: 101-201, Comprehensive Building, Tongzhou Electronics Longgang Factory Area, No.1 Baolong Fifth Road, Baolong Community, Baolong Street, Longgang District, Shenzhen, China Applicable Standards: FCC PART 15 C 15.247 ANSI C63.10-2020+Cor. 1-2023+C63.10a-2024+Errata to C63.10a-2024 KDB 662911 D01 Multiple Transmitter Output v02r01 Test Result: Pass Report Number: DLE-260824008R Prepared (Test Engineer): Ken Tan Reviewer (Supervisor): Jack Bu Approved (Manager): Jade Yang This test report is based on a single evaluation of one sample of above mentioned products. It is not permitted to be duplicated in extracts without written approval of Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-260824008R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 2 of 34 Table of Contents Page 1 . SUMMARY OF TEST RESULTS 4 1.1 MEASUREMENT UNCERTAINTY 4 2 . GENERAL INFORMATION 5 2.1 GENERAL DESCRIPTION OF EUT 5 2.2 DESCRIPTION OF TEST MODES 6 2.3 BLOCK DIGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 6 2.4 DESCRIPTION OF SUPPORT UNITS(CONDUCTED MODE) 7 2.5 TABLE OF PARAMETERS OF TEST SOFTWARE SETTING 7 2.6 EQUIPMENTS LIST FOR ALL TEST ITEMS 8 3 . EMC EMISSION TEST 9 3.1 CONDUCTED EMISSION MEASUREMENT 9 3.1.1 POWER LINE CONDUCTED EMISSION LIMITS 9 3.1.2 TEST PROCEDURE 9 3.1.3 DEVIATION FROM TEST STANDARD 9 3.1.4 TEST SETUP 10 3.1.5 EUT OPERATING CONDITIONS 10 3.1.6 TEST RESULTS 10 3.2 RADIATED EMISSION MEASUREMENT 13 3.2.1 RADIATED EMISSION LIMITS 13 3.2.2 TEST PROCEDURE 14 3.2.3 DEVIATION FROM TEST STANDARD 14 3.2.4 TEST SETUP 14 3.2.5 EUT OPERATING CONDITIONS 15 3.2.6 TEST RESULTS (BETWEEN 9KHZ – 30 MHZ) 16 3.2.7 TEST RESULTS (BETWEEN 30MHZ – 1GHZ) 17 3.2.8 TEST RESULTS (1GHZ~25GHZ) 19 3.3 RADIATED BAND EMISSION MEASUREMENT 23 3.3.1 TEST REQUIREMENT: 23 3.3.2 TEST PROCEDURE 23 3.3.3 DEVIATION FROM TEST STANDARD 23 3.3.4 TEST SETUP 24 3.3.5 EUT OPERATING CONDITIONS 24 3.4 CONDUCTED BAND EDGE EMISSION&CONDUCTED SPURIOUS EMISSIONS MEASUREMENT 29 3.4.1 APPLICABLE STANDARD 29 3.4.2 TEST PROCEDURE 29 3.4.3 DEVIATION FROM STANDARD 29 Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-260824008R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 3 of 34 Table of Contents Page 3.4.4 TEST SETUP 29 3.4.5 EUT OPERATION CONDITIONS 29 3.4.6 TEST RESULTS 29 4 . AVERAGE OUTPUT POWER 30 4.1 APPLIED PROCEDURES / LIMIT 30 4.1.1 TEST PROCEDURE 30 4.1.2 DEVIATION FROM STANDARD 30 4.1.3 TEST SETUP 30 4.1.4 EUT OPERATION CONDITIONS 30 4.1.5 TEST RESULTS 30 5 . POWER SPECTRAL DENSITY TEST 31 5.1 APPLIED PROCEDURES / LIMIT 31 5.1.1 TEST PROCEDURE 31 5.1.2 DEVIATION FROM STANDARD 31 5.1.3 TEST SETUP 31 5.1.4 EUT OPERATION CONDITIONS 31 5.1.5 TEST RESULTS 31 6 . 6DB BANDWIDTH TEST 32 6.1 APPLIED PROCEDURES / LIMIT 32 6.1.1 TEST PROCEDURE 32 6.1.2 DEVIATION FROM STANDARD 32 6.1.3 TEST SETUP 32 6.1.4 EUT OPERATION CONDITIONS 32 6.1.5 TEST RESULTS 32 7 . DUTY CYCLE TEST SIGNAL 33 7.1 APPLIED PROCEDURES / LIMIT 33 7.1.1 TEST PROCEDURE 33 7.1.2 DEVIATION FROM STANDARD 33 7.1.3 TEST SETUP 33 7.1.4 EUT OPERATION CONDITIONS 33 7.1.5 TEST RESULTS 33 8 . ANTENNA REQUIREMENT 34 8.1 STANDARD REQUIREMENT 34 8.2 EUT ANTENNA 34 9 . TEST SETUP PHOTO 34 10 . EUT PHOTO 34 Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-260824008R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 4 of 34 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: FCC Part15 (15.247) , Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS 15.205, 15.209, 15.247(d) Radiated Spurious Emission PASS 15.209, 15.205 Band Edge Emission PASS 15.247(d) Conducted Spurious Emissions PASS 15.247(b) Average Output Power PASS 15.247(a)(2) 6dB Bandwidth PASS 15.247(e) Power Spectral Density PASS 15.203 Antenna Requirement PASS NOTE: (1)” N/A” denotes test is not applicable in this Test Report Test lab: Shenzhen DL Testing Technology Co., Ltd. Address: 101-201, Comprehensive Building, Tongzhou Electronics Longgang Factory Area, No.1 Baolong Fifth Road, Baolong Community, Baolong Street, Longgang District, Shenzhen, China FCC Test Firm Registration Number: 854456 Designation Number: CN1307 IC Registered No.: 27485 CAB ID.: CN0118 1.1 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ± U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2，providing a level of confidence of approximately 95 %。 No. Item Uncertainty 1 Conducted Emission Test ±2.56dB 2 RF power,conducted ±0.42dB 3 Spurious emissions,conducted ±2.76dB 4 All emissions,radiated(<1G) ±3.65dB 5 All emissions,radiated(>1G) ±4.89dB 6 Temperature ±0.5°C 7 Humidity ±2% 8 6dB Bandwidth ±0.2% 9 Power Spectral Density ±2.45dBm Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-260824008R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 5 of 34 2. GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF EUT Product Name: Integrated High-resolution Music Streamer and DAC Trade Mark: Model Number: H1 Model Difference N/A Operation F…

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Shenzhen Yingjiachuang Electronic Technology Co., LTD http://www.szsyjc.com 1 Address: Building C, Hongyu Guangming Valley, No. 11, Youma Gang Road, Ma Tian Street, Guangming District, ShenzhenDongguan Branch: Yingjiachuang Industrial Park, No. 2 Yinhe 3rd Road, Shishuikou, Qiaotou Town, Dongguan CityHangzhou Office: 212, Building B, Dahua Jianghong International Innovation Park, 369 Internet of Things Street, Binjiang District, HangzhouMianyang Office: No. 4F-34 Wanxiang High-tech International, No. 35 Mianxing East Road, Mianyang High-tech Zone, Sichuan Province telephone：0755-27810060 fax：0755-27810057 website：http://www.szsyjc.com CUSTOMER NAME Shenzhen Kaibo Technology Co., Ltd. CUSTOMER P/N PART NAME2.4G 90° curved male-to-male black split antenna P/ N YJC-60302-B58 APPROVAL REV. A0 DELIVERY DATE January 8th, 2026 PREPARED BY Yin Feijie CHECKED BY Fang Wenfeng APPROVED BY Chauhan Customer Approved Prepared ByChecked ByApproved By Shenzhen Yingjiachuang Electronic Technology Co., LTD http://www.szsyjc.com 2 catalogue 1、Cover ·············································································· 1 2、Directory ·········································································· 2 3、Revise the resume ································································3 4、Antenna plan view ······························································4 5、Antennatechnicalparametersand environmental performance testing···········5 6、Antenna physical diagram ················································6 7、Antenna performance test chart ······································6 8、2D.3D (2.4G ) Test Data ··············································7-9 9、ROHS Material Control Report ·····································10 Shenzhen Yingjiachuang Electronic Technology Co., LTD http://www.szsyjc.com 3 Revise the resume： Version Change content and reasons for the changeDateIssue A/0First edition releaseJanuary 8th, 2026 Shenzhen Yingjiachuang Electronic Technology Co., LTD http://www.szsyjc.com 4 Antenna plan view： Shenzhen Yingjiachuang Electronic Technology Co., LTD http://www.szsyjc.com 5 Antenna technical parameters and e…

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