2ARKF-BT-31DUSB Bluetooth adapter

 Innotrik BT-31D USB dongle specification  1. Description of background and application scenarios With bluetooth speakers, the popularity of bluetooth headset, wireless brought great convenience into people's life, so he went to the cable is a major trend of the current consumer electronics industry, and the integrity of the bluetooth technology with its agreement, generality and standards, as well as the innate advantage in intelligent devices, become the preferred one of wireless communication technology, for the PC, through USB sound card output, can do not drive, than by ordinary bluetooth dongle is better output in the PC compatibility and ease of use.The following are several commonly used scenarios, but they are not limited to them. This scheme can be considered as long as such scenarios are similar to those in which PC pushes audio to Bluetooth receiving devices. As shown in Figure 1 below, it is mainly used for computer to push audio to Bluetooth speaker headset through Bluetooth, or to make voice chat or call or to hold teleconference through Bluetooth speaker headset. Figure.1 As shown in Figure 2 below, it is mainly used in the teleconference system, which is equivalent to eliminating the microphone line of the traditional telephone system and making the microphone part wireless. Figure 2 As shown in Figure 3 below, it is mainly used in the home living room scenario, where the TV sound is emitted to the Bluetooth speaker or headset through the Dongle. Figure 3 2、The principle diagram This case the principle diagram of the following block diagram is shown in FIG. 4, the computer via usb audio dongle and connection, the dongle via bluetooth A2DP HFP and bluetooth speakers or headphones, you can put the music on the computer to bluetooth speakers or headphones, or use a bluetooth speakers or headphones through chat software or a conference call with a friend for voice calls, through usb HID the AVRCP and bluetooth, bluetooth speakers or headphones can also do some control of the PC play. Figure 4 3、function declaration ： function require remark Support Bluetooth 5.0 protocol Bluetooth supports version 5.0 of the core protocol, as well as the Bluetooth Profile (A2DP, HFP) involved in the related voice call dongle. Supports USB Audio audio transmission The PC sends the audio output to a dongle via USB Audio channel, and then the dongle sends it to the receiving device (speaker or headset) via Bluetooth A2DP. Support USB Audio voice call hands-free One end of the dongle is connected to the PC through USB Audio channel, and the other end is connected to the Bluetooth speaker or headset through Bluetooth HFP as an AG role. Thus, the Bluetooth speaker or headset can be used to realize the hands-free function of the calling software on the PC. Support ordinary voice and HD voice when voice calls Voice calls can support ordinary voice (8K sampling rate, CVSD codec), can also support WBS (that is, broadband voice: support 16K sampling rate and MSBC codec). Bluetooth audio transmission support AVRCP control The receiver can control the transmitter through AVRCP to play, pause, up and down switch and so on Bluetooth audio transmission supports digital volume adjustment When bluetooth is transmitted, if the connected bluetooth speaker end does not support volume synchronization, you can adjust the digital volume of the sent data. Support volume synchronization for Bluetooth audio transmission or voice calls Support receiver and transmitter volume synchronization function, that is, the receiver and transmitter use a common volume. 4、Bluetooth protocol support agreement scheme requirement BQB needs remark Bluetooth Core Protocol Version V5.0 support A2DP version V1.3 support A2DP SRC role support support AVRCP version V1.6 support TG AVRCP role support support HFP version V1.7 support Role of HFP AG support support 5、Binding and Connection 1) Plug the Dongle into the USB port on your PC 2) Select the USB Dongle as the default sound card on the PC side according to the following operation 3) Switch on the Bluetooth speaker or earphone, and then press the pairing button (some speakers or earphones are not required, and the details are subject to the product manual) to enter the pairing mode 4) Put the Bluetooth speaker or headset close to Dongle. In order to improve the success rate of pairing, it is better to wait for pairing within 0.5 meters. Then Dongle will choose the nearest Bluetooth speaker or headset to connect 5) when the dongle and bluetooth speakers or headset paired automatically connected to the speakers or headset, bluetooth speakers or headphones after being connected, will have a speech or prompt, if is not sure whether the connection is successful, can open players play songs in the PC terminal, if after the success of the bluetooth connection, you can play the song sounds on speakers or headphones 6) When the Bluetooth connection is successful, the device will be bound, and the next boot will be connected to the device by default 6、AVRCP control If the speaker or headset has "Next", "Prev", "Play/Pause" keys and AVRCP support, you can press "Next", "Prev" keys on the speaker or headset to switch "Next, Last" to the PC player, press "Play/Pause" to pause or resume the player on the PC. 7、communicate by telephone The dongle can support PC WeChat, QQ, SkyP and other conference software calls, the followinWeChatB1 as an example to explain how to use, other communication tools are similar: Open the PC terminal WeChat, initiate voice chat to friends, enter the voice chat interface, normal voice chat, then the other side's voice will be played out in the speaker or earphone end, and you speak to the speaker or earphone, the other side can also hear your voice. 8、The volume synchronization If the Bluetooth speaker or headset has a volume button and supports volume synchronization, you can adjust the volume on the PC side by pressing the volume button on the speaker or headset when …

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CONFIDENTIALITY REQUEST for Certification Service in USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21046 Date:<2021-3-1> Pursuant to Paragraphs §0.457 and 0.459 of the Commission’s Rules (47 C.F.R.) and Section §552(b)(4) of the Freedom of Information Act, we requests confidentiality for the following products: FCC ID Model name 2ARKF-BT-31D BT-31D For the product stated above, we request that the following information be held confidential; Exhibits Long-Term Confidentiality Short-Term Confidentiality Short-Term Confidentiality Days External Photos Internal Photos Block Diagram Schematics Test Setup Photos User’s Manual Parts List Tune Up Operational Descriptions The long-term confidentiality exhibits contain our trade secrets and proprietary information that could be of benefit to our competitors. The short-term confidentiality on the basis of ensuring that business sensitive information remains confidential until the actual marketing of our new device. If you have any questions, please feel free to contact me at the address shown below. Sincerely, Name/Title： Jindi Liang/Office manager Company: Shenzhen Innotrik Technology Co., Ltd Address: Room 1302-1307, Building No.13, Qinchengda Paradise, District 22, Lingzhiyuan Community, Xin’ an Street, Bao’ an District, Shenzhen; China Phone: 86-755-27811125 Fax: 86-755-27811125 E-Mail: [email protected]

Shenzhen Innotrik Technology Co., Ltd Room 1302-1307, Building No.13, Qinchengda Paradise, District 22, Lingzhiyuan Community, Xin’ an Street, Bao’ an District, Shenzhen; China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2021-3-1 To whom it may concern: We, Shenzhen Innotrik Technology Co., Ltd the undersigned, hereby authorize Eurofins Product Service GmbH to act on our behalf in all matters relating to applications for equipment authorization FCC ID: 2ARKF-BT-31D including the signing of all documents related to these matters. Any and all acts carried out by Eurofins Product Service GmbH on our behalf shall have the same effect as acts of our own. We also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. Sincerely, Name/Title： Jindi Liang/Office manager Company: Shenzhen Innotrik Technology Co., Ltd Address: Room 1302-1307, Building No.13, Qinchengda Paradise, District 22, Lingzhiyuan Community, Xin’ an Street, Bao’ an District, Shenzhen; China Phone: 86-755-27811125 Fax: 86-755-27811125 E-Mail: [email protected]

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 3 External Photos of the EUT Fig.1 Fig.2 SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 2 of 3 Fig.3 Fig.4 SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 3 of 3 Fig.5 Fig.6

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 1 Label and Location Size: L1.0cm*W0.5cm Material: Tagboard Glue: adhesive sticker Font color: White Label color: Black Label Location USB Bluetooth adapter Model No.: BT-31D FCC ID: 2ARKF-BT-31D

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 2 Internal Photos of the EUT Fig.8 Fig.9 SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 2 of 2 Fig.10 BT Antenna

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 4 FCC RF Exposure Evaluation 1. Product Information FCC ID 2ARKF-BT-31D Product name USB Bluetooth adapter Model number BT-31D Power supply Input: DC 5V, 500mA Bluetooth 2402MHz ~ 2480MHz Channel Number 79 channels for Bluetooth V5.0(DSS) Channel Spacing 1MHz for Bluetooth V5.0 (DSS) Modulation Type GFSK, π/4-DQPSK, 8-DPSK for Bluetooth V5.0(DSS) Bluetooth Version V5.0 Antenna Type Internal Antenna Antenna Gain 0.5dBi(Max.) Hardware Version / Software Version / Exposure category General population/uncontrolled environment EUT Type Production Unit Device Type Portable Device 2. Evaluation Method According to KDB447498 D01 General RF Exposure Guidance v06 Section 4.3.1 Standalone SAR test exclusion considerations: “Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition, listed below, is satisfied. These test exclusion conditions are based on source-based time-averaged maximum conducted output power of the RF channel requiring evaluation, adjusted for tune-up tolerance, and the minimum test separation distance required for the exposure conditions.22 The minimum test separation distance is determined by the smallest distance from the antenna and radiating structures or outer surface of the device, according to the host form factor, exposure conditions and platform requirements, to any part of the body or extremity of a user or bystander (see 5) of section 4.1). To qualify for SAR test exclusion, the test separation distances applied must be fully explained and justified by the operating configurations and exposure conditions of the transmitter and applicable host platform requirements, typically in the SAR measurement or SAR analysis report, according to the required published RF exposure KDB procedures. When no other RF exposure testing or reporting is required, a statement of justification and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for the SAR test exclusion. When required, the device specific conditions described in the other published RF exposure KDB procedures must be satisfied before applying these SAR test exclusion provisions; for example, handheld PTT two-way radios, handsets, laptops & tablets etc.“ [(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 • 3.0 and 7.5 are referred to as the numeric thresholds in the step 2 below The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm according to f) in section 4.1 is applied to determine SAR test exclusion. SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 2 of 4 When one of the following test exclusion conditions is satisfied for all combinations of simultaneous transmission configurations, further equipment approval is not required to incorporate transmitter modules in host devices that operate in the mixed mobile and portable host platform exposure conditions. The grantee is responsible for documenting this according to Class I permissive change requirements. Antennas that qualify for standalone SAR test exclusion must apply the estimated standalone SAR to determine simultaneous transmission test exclusion. a) The [∑ of (the highest measured or estimated SAR for each standalone antenna configuration, adjusted for maximum tune-up tolerance) / 1.6 W/kg] + [∑ of MPE ratios] is ≤ 1.0. b)The SAR to peak location separation ratios of all simultaneously transmitting antenna pairs operating in portable device exposure conditions are all ≤ 0.04, and the [∑ of MPE ratios] is ≤ 1.0. 1. Refer Evaluation Method ANSI C95.1–1999: IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz. FCC KDB publication 447498 D01 General RF Exposure Guidance v06: Mobile and Portable Devices RF Exposure Procedures and Equipment Authorization Policies. FCC CFR 47 part1 1.1310: Radiofrequency radiation exposure limits. FCC CFR 47 part2 2.1093: Radiofrequency radiation exposure evaluation: portable devices SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 3 of 4 2. Conducted Power Results <BT> Mode Channel Frequency (MHz) Peak Conducted Output Power (dBm) GFSK 0 2402 1.746 39 2441 0.030 78 2480 -1.911 π/4DQPSK 0 2402 4.142 39 2441 2.331 78 2480 0.367 8DPSK 0 2402 4.669 39 2441 2.820 78 2480 0.884 SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 4 of 4 3. Manufacturing Tolerance <BT> GFSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 1.0 0 -1.0 Tolerance ±(dB) 1.0 1.0 1.0 π/4DQPSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 4.0 2.0 0 Tolerance ±(dB) 1.0 1.0 1.0 8DPSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 4.0 2.0 0 Tolerance …

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SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 1 of 47 Appendix A RF Test Data for BT V5.0(BDR/EDR) (Conducted Measurement) Product Name: USB Bluetooth adapter Trade Mark: INNOTRIK, AUCTOPUS Test Model: BT-31D Environmental Conditions Temperature: 21.3 C Relative Humidity: 49.6% ATM Pressure: 100.0 kPa Test Engineer: Carl Fu Supervised by: Li Huan B.1 Maxmum Conducted Peak Output Power Mode Channel. Maximum Peak Output Power [dBm] Limit [dBm] Verdict GFSK LCH 1.746 21 PASS MCH 0.030 21 PASS HCH -1.911 21 PASS π/4DQPSK LCH 4.142 21 PASS MCH 2.331 21 PASS HCH 0.367 21 PASS 8DPSK LCH 4.669 21 PASS MCH 2.820 21 PASS HCH 0.884 21 PASS SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 2 of 47 Test Graphs GFSK/LCH GFSK/MCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 3 of 47 GFSK/HCH π/4DQPSK/LCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 4 of 47 π/4DQPSK/MCH π/4DQPSK/HCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 5 of 47 8DPSK/LCH 8DPSK/MCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 6 of 47 8DPSK/HCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 7 of 47 B.2 20dB Bandwidth Mode Channel. 20dB Bandwidth [MHz] Limit [MHz] Verdict GFSK LCH 0.9508 Not Specified PASS MCH 0.9499 Not Specified PASS HCH 0.9517 Not Specified PASS π/4DQPSK LCH 1.318 Not Specified PASS MCH 1.320 Not Specified PASS HCH 1.319 Not Specified PASS 8DPSK LCH 1.321 Not Specified PASS MCH 1.317 Not Specified PASS HCH 1.322 Not Specified PASS Test Graphs GFSK/LCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 8 of 47 GFSK/MCH GFSK/HCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 9 of 47 π/4DQPSK/LCH π/4DQPSK/MCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 10 of 47 π/4DQPSK/HCH 8DPSK/LCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 11 of 47 8DPSK/MCH 8DPSK/HCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 12 of 47 B.3 Carrier Frequency Separation Mode Channel. Carrier Frequency Separation [MHz] Limit [MHz] Verdict GFSK LCH 1.015 0.634 PASS MCH 1.142 0.634 PASS HCH 1.022 0.634 PASS π/4DQPSK LCH 1.186 0.880 PASS MCH 1.062 0.880 PASS HCH 0.982 0.880 PASS 8DPSK LCH 1.004 0.881 PASS MCH 0.998 0.881 PASS HCH 1.086 0.881 PASS Test Graphs GFSK/LCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 13 of 47 GFSK/MCH GFSK/HCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 14 of 47 π/4DQPSK/LCH π/4DQPSK/MCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 15 of 47 π/4DQPSK/HCH 8DPSK/LCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 16 of 47 8DPSK/MCH 8DPSK/HCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 17 of 47 B.4 Hopping Channel Number Mode Channel. Number of Hopping Channel [N] Limit [N] Verdict GFSK Hop 79 >=15 PASS π/4DQPSK Hop 79 >=15 PASS 8DPSK Hop 79 >=15 PASS Test Graphs GFSK/Hop π/4DQPSK/Hop SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 18 of 47 8DPSK/Hop SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 19 of 47 B.5 Dwell Time Mode Packet Channel Burst Width [ms/hop/ch] Total Hops[hop*ch] Dwell Time[s] Limit [s] Verdict GFSK DH5 LCH 2.9 106.7 0.309 0.4 PASS DH5 MCH 2.9 106.7 0.309 0.4 PASS DH5 HCH 2.9 106.7 0.309 0.4 PASS π/4DQPSK 2DH5 LCH 2.9 106.7 0.309 0.4 PASS 2DH5 MCH 2.9 106.7 0.309 0.4 PASS 2DH5 HCH 2.9 106.7 0.309 0.4 PASS 8DPSK 3DH5 LCH 2.9 106.7 0.309 0.4 PASS 3DH5 MCH 2.9 106.7 0.309 0.4 PASS 3DH5 HCH 2.9 106.7 0.309 0.4 PASS Test Graphs GFSK_DH5/LCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 20 of 47 GFSK_DH5/MCH GFSK_DH5/HCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 21 of 47 π/4DQPSK _2DH5/LCH π/4DQPSK _2DH5/MCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 22 of 47 π/4DQPSK _2DH5/HCH 8DPSK _3DH5/LCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 23 of 47 8DPSK _3DH5/MCH 8DPSK _3DH5/HCH SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 24 of 47 B.6 RF Conducted Spurious Emissions Mode Channel Pref [dBm] Max. Level [dBm] Limit [dBm] Verdict GFSK LCH 1.507 -37.153 -18.493 PASS MCH -0.316 -37.666 -20.316 PASS HCH -2.299 -36.735 -22.299 PASS π/4DQPSK LCH 1.558 -37.194 -18.442 PASS MCH -0.385 -36.771 -20.385 PASS HCH -2.391 -36.829 -22.391 PASS 8DPSK LCH 1.2 -37.402 -18.800 PASS MCH -0.198 -36.783 -20.198 PASS HCH -2.328 -37.171 -22.328 PASS GFSK_LCH_Graphs Pref SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 25 of 47 Puw GFSK_MCH_Graphs Pref SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 26 of 47 Puw GFSK_HCH_Graphs Pref SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 27 of 47 Puw π/4DQPSK_LCH_Graphs Pref SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB Page 28 of 47 Puw π/4DQPSK_MCH_Graphs Pref SH…

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SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 36 FCC TEST REPORT FOR Shenzhen Innotrik Technology Co., Ltd USB Bluetooth adapter Test Model: BT-31D Prepared for : Shenzhen Innotrik Technology Co., Ltd Address : Room 1302-1307, Building No.13, Qinchengda Paradise, District 22, Lingzhiyuan Community, Xin’an Street, Bao’an District, Shenzhen; China Prepared by : Shenzhen LCS Compliance Testing Laboratory Ltd. Address : 101, 201 Bldg A & 301 Bldg C, Juji Industrial Park Yabianxueziwei, Shajing Street, Baoan District, Shenzhen, 518000, China Tel : (+86)755-82591330 Fax : (+86)755-82591332 Web : www.LCS-cert.com Mail : [email protected] Date of receipt of test sample : December 30, 2020 Number of tested samples : 2 Sample No. ： 210104121A-1, 210104121A-2 Serial number : Prototype Date of Test : December 30, 2020 ~ January 22, 2021 Date of Report : January 26, 2021 SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 2 of 36 FCC TEST REPORT FCC CFR 47 PART 15 C (15.247) Report Reference No. ....................... : LCS210104121AEB Date of Issue ......................................... : January 26, 2021 Testing Laboratory Name ................. : Shenzhen LCS Compliance Testing Laboratory Ltd. Address ................................................. : 101, 201 Bldg A & 301 Bldg C, Juji Industrial Park Yabianxueziwei, Shajing Street, Baoan District, Shenzhen, 518000, China Testing Location/ Procedure ................ : Full application of Harmonised standards ■ Partial application of Harmonised standards □ Other standard testing method □ Applicant’s Name ............................... : Shenzhen Innotrik Technology Co., Ltd Address ................................................. : Room 1302-1307, Building No.13, Qinchengda Paradise, District 22, Lingzhiyuan Community, Xin’an Street, Bao’an District, Shenzhen; China Test Specification Standard ............................................... : FCC CFR 47 PART 15 C (15.247) Test Report Form No............................ : LCSEMC-1.0 TRF Originator ..................................... : Shenzhen LCS Compliance Testing Laboratory Ltd. Master TRF .......................................... : Dated 2011-03 Shenzhen LCS Compliance Testing Laboratory Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen LCS Compliance Testing Laboratory Ltd. is acknowledged as copyright owner and source of the material. Shenzhen LCS Compliance Testing Laboratory Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test Item Description. ........................ : USB Bluetooth adapter Trade Mark ........................................... : INNOTRIK, AUCTOPUS Test Model ........................................... : BT-31D Ratings ................................................. : Input: DC 5V, 500mA Result ................................................. : Positive Tested by: Compiled by: Approved by: Vera Deng/ Administrator Jin Wang/ Technique principal Gavin Liang / Manager SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 3 of 36 FCC -- TEST REPORT Test Result Positive The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Revision History Revision Issue Date Revisions Revised By Test Report No. : LCS210104121AEB January 26, 2021 Date of issue Test Model.............................. : BT-31D EUT......................................... : USB Bluetooth adapter Applicant............................... : Shenzhen Innotrik Technology Co., Ltd Address................................... : Room 1302-1307, Building No.13, Qinchengda Paradise, District 22, Lingzhiyuan Community, Xin’an Street, Bao’an District, Shenzhen; China Telephone............................... : / Fax.......................................... : / Manufacturer......................... : Shenzhen Innotrik Technology Co., Ltd Address................................... : Room 1302-1307, Building No.13, Qinchengda Paradise, District 22, Lingzhiyuan Community, Xin’an Street, Bao’an District, Shenzhen; China Telephone............................... : / Fax.......................................... : / Factory................................... : / Address................................... : / Telephone............................... : / Fax.......................................... : / SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 4 of 36 000 January 26, 2021 Initial Issue Gavin Liang SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D Report No.: LCS210104121AEB This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 5 of 36 TABLE OF CONTENTS Description Page 1.GENERAL INFORMATION ...................................................................................................... 6 1.1 Description of Device (EUT) ............................................................................................................... 6 1.2 Support equipment List …

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SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D _______________________________________________________________________________________________ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 2 Test Setup Photos of the EUT Test Setup Photo(s) of Radiated Emissions Measurement Fig. 1 Fig. 2 SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ARKF-BT-31D _______________________________________________________________________________________________ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 2 of 2 Test Setup Photo(s) of Conducted Emissions Measurement Fig. 3