2AMSOCSTW-548-2FDCircular Motion Truly Wireless Spea

Circular Motion Truly Wireless Spea Instruction Manual CSTW-548-2FD Features: True wireless stereo function Support USB/TF card FM Radio AUX-in function Karaoke Function Rechargeable Lithium battery Accessory： Charging cable: 1 piece; Audio cable: 2 piece; User manual: 1 piece; Product Overview 1. POWER ON/OFF/ : Turn on/off the device. 2. MIC-IN: Microphone-i n 3. Aux: 3.5mm aux in jack 4. USB slot: Play the Mp3 file from USB 5. TF slot: Play the Mp3 file from TF card 6. MODE : Short press to select BT/FM/USB/TF function . 7.ll : short press to play/pause music in USB/TF/Bluetooth mode; short press to select FM radio station , long press to search FM radio station automatically . 8. : short press to play the previous song in USB/TF/Blutooth mode; short press to play previous channel in FM mode. Press and hold to decrease the volume 9. :short press to play next song in USB/TF/Bluetooth model; short press to play next FM radio station. Press and hold to increase the volume 10. Press the button to pair or unpair (connect or disconnect ) the TWS . 11. Press to change or turn off the flash light mode 12. DC-5V: DC-5V USB charge port Charging Your Bluetooth Speaker 1. Before using this device for the first time ,please fully charge the battery. 2. Plug one end of the provided micro USB cable into the port of the Bluetooth speaker. 3. Plug the other end of the USB cable into a local power source. 4. When your Bluetooth speaker is charging the LED indicator will glow red. 5. When the Bluetooth speaker is fully charged the LED indicator will turn off. Note: When the battery is getting low the user will hear a notification sound. This indicates that the speaker needs to be plugged in and charged immediately. Connecting via Bluetooth 1. Turn on the both of speaker. 2. The both of speaker will pairing and connected automatically. 3. Open the Bluetooth settings on a Bluetooth enabled device (phone, tablet,etc.) Turn on the devices Bluetooth functionality and scan for nearby Bluetooth devices. 4. In the available list , you will see “CSTW-548-2FD”, select this device. 5. When the connection is successful, the user will hear a notification sound. TWS connection The CSTW-548-2FD supports true wireless stereo pairing. They may stream music from their phone to both speakers at the same time. 1. Power on the two devices at the same time. 2. The both of speaker will pairing and connected automatically. Note: the True Wireless stereo function only work in Bluetooth mode. The speaker that’s connected on the Bluetooth enabled device will become the primary speaker. While the other will become the secondary speaker. If the user turn off the primary speaker , the secondary speaker will be stop working. 3. Press the button to connect or disconnect both speaker if user wants TWS function or not. Music Controls When the Bluetooth enabled device is paired with the Bluetooth Speaker. Music will be playable using the user’s app of choice. Press the button ll to Play/Pause, press button -/ and /+ to Prev and Next music . Press and hold the button -/ and /+ to turn down and turn up the Volume. Using the AUX-IN connection 1. Press the button MODE to select Aux mode 2. Connect one end of an AUX cable to the Bluetooth speaker. Connect the other end to the bluetooth enabled device. 3. Press and hold the -/ and /+ buttons to decrease and increase the volume. Note: When an AUX cable is connected to the speaker , It will automatically unpair from any actively paired Bluetooth device. USB/TF Card 1. Insert the USB or TF card into the USB/TF slot. 2. The device will play the MP3 format music automatically. Short Press the button ll to Play/Pause the song, short press the button -/ and /+ to play Prev. and next song, press and hold the -/ and /+ buttons to decrease and increase the volume. FM Radio Press the button MODE to select the FM radio function and then press ll to start searching FM channel automatically. This operation will scan all FM stations and Pre-record them to the memory . The scan process will take several minutes to complete and should not be interrupted. Once complete, you can short press -/ or /+ to move forward or backward. Press and hold the -/ and /+ buttons to decrease and increase the volume Specification: Output power :5W Driver unit size :4 inch Impedance:3 Ohm S/N ratio :≥80dB Separation:≥45dB Distortion:≤1.0% Frequency response :100Hz-20KHz Bluetooth version :V4 .2 Bluetooth range :10 meters Bluetooth pairing name CSTW-548-2FD Bluetooth profiles supported :A2DP USB & TF max. memory supported :32 GB FM radio :87.5-108.0MHz Battery capacity :Built-in 1800mAh Battery type :Li-ion Playback time :90MINS in max. volume Charging indicator :Yes Charge voltage :DC 5V FCC Caution： This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: -Reorient or relocate the recei…

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Summit Electronics LLC Agent Authorization Company: Summit Electronics LLC Address: 1 Rewe Street, Brooklyn New York 11211, United States Product Name: Circular Motion Truly Wireless Spea Model Number(s): CSTW-548-2FD, CSTW-548-BLK Trademark: COBY FCC ID: 2AMSOCSTW-548-2FD We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: 2020/07/30 Name: Moshe Dancikier Title: Sourcing Company: Summit Electronics LLC

Summit Electronics LLC Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2020/07/30 Subject; Request for Confidentiality FCC ID: 2AMSOCSTW-548-2FD To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Operational Description In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuantto KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Moshe Dancikier Title: Sourcing

Summit Electronics LLC Model Difference Product Name: Circular Motion Truly Wireless Spea Model Number(s): CSTW-548-2FD, CSTW-548-BLK Trademark: COBY All the model are the same circuit and RF module, except model names. Regards Sincerely Client’s signature: Client’s name / title : Moshe Dancikier / Sourcing Contact information / address: 1 Rewe Street, Brooklyn New York 11211, United States

External Photos

50*20mm Label Location FCC ID: 2AMSOCSTW-548-2FD This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:(1)This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause und esired operation.

Internal Photos Antenna

Shenzhen BCTC Testing Co., Ltd. FCC ID: 2AMSOCSTW-548-2FD Portable device According to §15.247(e)(i) and §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to KDB447498 D01 General RF Exposure Guidance V06 The 1-g SAR and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)]·[√f(GHZ)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where: • f(GHZ) is the RF channel transmit frequency in GHz • Power and distance are rounded to the nearest mW and mm before calculation • The result is rounded to one decimal place for comparison When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion GFSK2.4801.931.562±13.002.00<50.628433.00YES Pi/4 DQPSK 2.4802.621.832±13.002.00<50.628433.00YES Conclusion: For the max result : 0.62843＜3.0, the SAR testing is not required.

Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2007000987E Test Report Tel: 400-788-9558 Web: https://www.bctc-lab.com BCTC/RF-EMC-007 Ver.：A.0 Page 1 of 59 FCC Part 15C Test Report FCC ID: 2AMSOCSTW-548-2FD Product Name: Circular Motion Truly Wireless Spea Trademark: COBY Model Name : CSTW-548-2FD CSTW-548-BLK Prepared For : Summit Electronics LLC Address : 1 Rewe Street, Brooklyn New York 11211, United States Prepared By : Shenzhen BCTC Testing Co., Ltd. Address : BCTC Building & 1-2F, East of B Building, Pengzhou Industrial, Fuyuan 1st Road, Qiaotou Community, Fuyong Street, Bao’an District, Shenzhen, China Test Date: Jul. 20, 2020 – Jul. 27, 2020 Date of Report : Jul. 28, 2020 Report No.: BCTC2007000987E Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2007000987E Test Report Tel: 400-788-9558 Web: https://www.bctc-lab.com BCTC/RF-EMC-007 Ver.：A.0 Page 2 of 59 TEST RESULT CERTIFICATION Applicant’s name ............. : Summit Electronics LLC Address ............................. : 1 Rewe Street, Brooklyn New York 11211, United States Manufacture's Name ........ : Summit Electronics LLC Address ............................. : 1 Rewe Street, Brooklyn New York 11211, United States Product description Product name .................... : Circular Motion Truly Wireless Spea Trademark ......................... : COBY Model and/or type reference .......................................... : CSTW-548-2FD CSTW-548-BLK Standards ......................... : FCC Part15.247 ANSI C63.10:2013 This device described above has been tested by BCTC, and the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. This report shall not be reproduced except in full, without the written approval of BCTC, this document may be altered or revised by BCTC, personal only, and shall be noted in the revision of the document. Prepared by(Engineer): Willem Wang Reviewer(Supervisor): Eric Yang Approved(Manager): Zero Zhou Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2007000987E Test Report Tel: 400-788-9558 Web: https://www.bctc-lab.com BCTC/RF-EMC-007 Ver.：A.0 Page 3 of 59 Table of Contents Test Report Declaration Page 1. TEST SUMMARY ...................................................... 5 2. TEST FACILITY ....................................................... 6 3. MEASUREMENT UNCERTAINTY........................................ 6 4. GENERAL INFORMATION .............................................. 7 4.1 GENERAL DESCRIPTION OF EUT ...................................... 7 4.2 Test Setup Configuration ................................................ 7 4.3 Support Equipment ..................................................... 8 4.4 Channel List ........................................................... 9 4.5 Test Mode ............................................................ 10 5. TEST FACILITY AND TEST INSTRUMENT USED ........................ 11 5.1 Test Facility ........................................................... 11 5.2 Test Instrument Used .................................................. 11 6. CONDUCTED EMISSIONS ............................................. 13 6.1 Block Diagram Of Test Setup ........................................... 13 6.2 Limit ................................................................. 13 6.3 Test procedure ........................................................ 13 6.4 Test Result ........................................................... 15 7. RADIATED EMISSIONS ............................................... 17 7.1 Block Diagram Of Test Setup ........................................... 17 7.2 Limit ................................................................. 18 7.3 Test procedure ........................................................ 18 7.4 Test Result ........................................................... 20 7.5 RADIATED BAND EMISSION MEASUREMENT AND RESTRICTED BANDS OF OPERATION ........................................................... 24 8. CONDUCTED EMISSION .............................................. 27 8.1 Block Diagram Of Test Setup ........................................... 27 8.2 Limit ................................................................. 27 8.3 Test procedure ........................................................ 27 8.4 Test Result ........................................................... 28 9. 20 DB BANDWIDTH .................................................. 34 9.1 Block Diagram Of Test Setup ........................................... 34 9.2 Limit ................................................................. 34 9.3 Test procedure ........................................................ 34 9.4 Test Result ........................................................... 35 10. MAXIMUM PEAK OUTPUT POWER .................................... 39 10.1 Block Diagram Of Test Setup .......................................... 39 10.2 Limit ................................................................ 39 10.3 Test procedure ....................................................... 39 10.4 Test Result .......................................................... 40 11. HOPPING CHANNEL SEPARATION .................................... 44 11.1 Block Diagram Of Test Setup .......................................... 44 Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2007000987E Test Report Tel: 400-788-9558 Web: https://www.bctc-lab.com BCTC/RF-EMC-007 Ver.：A.0 Page 4 of 59 11.2 Limit ................................................................ 44 11.3 Test procedure ....................................................... 44 11.4 Test Result .......................................................... 45 12. NUMBER OF HOPPING FREQUENCY .................................. 49 12.1 Block Diagram Of Test Setup .......................................... 49 12.2 Limit ................................................................ 49 12…

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Shenzhen BCTC Testing Co., Ltd. Spurious emissions Shenzhen BCTC Testing Co., Ltd. Conducted Measurement Photos