QWHSD251-BTWireless Earphone

Operating instruction of SD251-BT/BT251-BK I. Functions of keys Power On: Press center key for 3 seconds Power Off: Press center key for 3 seconds Volume Up: Short press "+" key Volume Down: Short press "-" key Next Track: Long press "+" key. Previous Track: Long press "-" key Play the Track: Press "center" key once Pause the Track: Press "center" key once Answer incoming call: Press "center" key once Refuse incoming call: Press "center" key twice End the call: Press "center" key once Last number Redial: Press "center" key twice Activate Siri: Press "center" key thrice MIC: Microphone USB: micro USB charging port II. Charging The Bluetooth headset has a built-in rechargeable battery and the battery power of a new headset is not enough; please charge for at least 1.5 hours to make the battery power enough before the first use. Hereafter, charging will take about 1 hour. While it is charging, the red light is on; while the charging is saturated, the red light will be off . III. Pairing of headset and Bluetooth device The Bluetooth headset must be paired with your mobile phone (or other Bluetooth devices) before use. 1. When the headset is in power-off state, please press center key to power on, will hear the voice prompt “power on “ and ”pairing”. 2. Search the Bluetooth device on your Bluetooth headset (please refer to the mobile phone instructions for detailed process). When the search is finished, you will find a new device called "SD251-BT" in the device list. 3. Select SD251-BT which will be automatically paired and connected with mobile phone; when the pairing connection is successful, will hear the voice prompt “connected “ Notes: In the process of pairing, some mobile phone requires inputting pairing password, please input "0000"; The headset will automatically shut down if it cannot find the paired device in 3-5 minutes; If the Bluetooth headset is not in the pairing state, your mobile phone or other Bluetooth devices will not be able to search to the headset, please set the headset to the pairing state and then use the mobile phone to search again. IV. Bluetooth wireless call When the Bluetooth headset is paired and connected with your mobile phone, you can use the headset to answer the phone or listen to the stereo music played mobile phone. (1) Dial-out, answer and hang up of calls by mobile phone Outgoing calls 1. Dial-out by mobile phone: Use your mobile phone to dial according to the way as usual, after dialing out, the headset will make a ringing tone, the voice will be automatically switched to the Bluetooth headset after putting through. (Some smart phones need to have a choice.) 2. Last number redial: Double-click the center key t o dial out the last dialing phone number. Answering and hanging up calls When a call comes in, you will hear a phone prompt sent by the headset. 1. When the phone rings, press center key once or press the phone answer key to answer the phone. 2. When the phone rings, press center key twice to refuse the phone. 3. If you are in call, long press “ + “to increase the headset volume, and long press” – “to decrease the headset volume. 4. Short press center key, phone hang-up key or hang up by the other end to end the call, if the mobile phone is connected with playing stereo music, the phone will continue to play the music after ending the call. V. Wireless stereo music playing The paired mobile phone shall support Bluetooth A2DP. 1. When the music is played, long press “-“ to make the music jump to the previous song.. 2. When the music is played, long press “+” to make the music jump to the next song. 3. When the music is played, press center key to stop the music, and then press center to continue playing the music. 4.When the music is played, long press “+” to increase the headset volume, and long press “-“ to decrease the headset volume. 5. During the stereo playing, if there is dial-up or call, the stereo playing will be automatically suspended, and the stereo music will continue to be played at the end of the phone. VI. Low voltage automatic detection and power off When the machine voltage is less than 3.3V, the red light will flash, will hear the battery low voice prompt. When the voltage is less than 3V, the headset will automatically power off. Please recharge in time. VII. Battery power indication: Paired IPHONE mobile, it will have headset battery power indication. VIII．Packing list : 1.SD251-BT Earphone headset 1pcs 2.USB charge cable 1pcs 3.Proudct user manual 1pcs Product specification and parameters: To prevent possible hearing damage, do not listen at high volume levels for long periods. A warning that batteries (battery pack or batteries installed) shall not be exposed to excessive heat Such as sunshine , fire or the like. CAUTION Product name Bluetooth stereo earphone Product model SD251-BT/BT251-BK Ve r s i o n Bluetooth V5.0 (QCC3005) Frequency range 2.402GHZ~2.480GHZ ISM Band Wireless transmission standard CLASS 2 Channel 79channels of 1Mhz BW Connection type Point-to-point Transmitting range <=10M (free space) Frequency response 20HZ-20KHZ Signal to Noise Ratio >82db Audio power output 2X3mW Status indication Red and blue bi-color indicator light Applicable pairing product USB Bluetooth adapter, Bluetooth mobile phone, IPAD, MID, etc in accordance with HFP, HSP, A2DP, AVRCP Bluetooth protocols Support decoder APTX/AAC/SBC Battery Polymer lithium-ion battery 3.7V 110mAH Charging time 1 hour Charging power supply Computer USB 5V; Charger of output DC 5V 500mA Operating time About 4.5 hours ( Battery saturation state) Standby time More than 150 hours ( Battery saturation state) Product size Danger of explosion if battery is incorrectly replaced Replace only with the same or equivalent type. FCC Statement 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 re…

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Music Tribe Commercial MY Sdn. Bhd. Declaration of Authorization We Name: Music Tribe Commercial MY Sdn. Bhd. Address: 1-17-02, Suntech @ Penang Cybercity, LinTang Mayang Pasir 3, Bayan Baru, Pulau Pinang, Malaysia City: Bayan Baru Country: Malaysia Declare that: Name Representative of agent: Ms. Rose Liu Agent Company name: BTL Inc. Address: No.3 Jinshagang 1 st Road, Shixia, Dalang Town City: Dong Guan Country: China is authorized to apply for Certification and signing related documents of the following product(s), including 731 form(s): Product description: Wireless Earphone Type designation: SD251-BT, BT251-BK Trademark: Behringer FCC ID: QWHSD251-BT on our behalf. Date: 2020-12-17 City: Bayan Baru Name: Kane xin Function: Innovation Compliance EMC Signature: -----------------------------------------

Rev 11/20/07 Music Tribe Commercial MY Sdn. Bhd. Federal Communications Commission Authorization and Evaluation Division Confidentiality Request regarding application for certification of FCC ID: (QWHSD251-BT). Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request confidential treatment of information accompanying this application as outlined below: Exhibit Type File Name Schematics, Block Diagram, Operational Description, 4. Schematics 5. Block Diagram 6. Operational Description The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. 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. (signature) Kane Xin

Model Declaration Letter Date: 2020.12.17 We, the undersigning company Company Name: Music Tribe Commercial MY Sdn. Bhd. A ddress: 1-17-02, Suntech @ Penang Cybercity, LinTang Mayang Pasir 3, Bayan Baru, Pulau Pinang, Malaysia Bayan Baru Malaysia Hereby confirm that the following products: Product description: Wireless Earphone Type Design: SD251-BT, BT251-BK B rand: Behringer That All versions of the Model SD251-BT and BT251-BK are electrically equal except the following d ifference: SD251-BT is the finished Bluetooth earphone, BT251-BK is Bluetooth cable,without ear bud. S ignature: Name: Kane Xin T elephone: 0760-23382666 EXT 8686 E-mail: [email protected]

Report No.: 2009C163 Page 1 of 14 ATTACHMENT PHOTOGRAPHS OF EUT Report No.: 2009C163 Page 2 of 14 SD251-BT Report No.: 2009C163 Page 3 of 14 Report No.: 2009C163 Page 4 of 14 BT251-BK Report No.: 2009C163 Page 5 of 14

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Report No.: BTL-FCCP-3-2009C163 Page 1 of 4 FCC RF EXPOSURE REPORT FCC ID: QWHSD251-BT Project No. : 2009C163 Equipment : Wireless Earphone Brand Name : Behringer Test Model : SD251-BT Series Model : BT251-BK Applicant : Music Tribe Commercial MY Sdn. Bhd. Address : 1-17-02, Suntech @ Penang Cybercity, LinTang Mayang Pasir 3, Bayan Baru, Pulau Pinang, Malaysia Manufacturer : Music Tribe Commercial MY Sdn. Bhd. Address : 1-17-02, Suntech @ Penang Cybercity, LinTang Mayang Pasir 3, Bayan Baru, Pulau Pinang, Malaysia Factory : iLike Electronics Co., Ltd. Address : Floor 1 and 2 of No. 2300267, 2300268, Ju Ling old village, Ju Tang Community, Guanlan Street, Longhua New District, Shenzhen, China. Date of Receipt : Sep. 28, 2020 Date of Test : Sep. 29, 2020 ~ Dec. 10, 2020 Issued Date : Jan. 05, 2020 Report Version : R01 Test Sample : Engineering Sample No.: DG202010284. Standard(s) : FCC Guidelines for Human Exposure IEEE C95.1 & KDB447498 D01 The above equipment has been tested and found compliance with the requirement of the relative standards by BTL Inc. Prepared by : Vincent Tan Approved by : Ethan Ma Add: No.3, Jinshagang 1st Road, Shixia, Dalang Town,Dongguan, Guangdong, China. Te l : +86-769-8318-3000 Web: www.newbtl.com Report No.: BTL-FCCP-3-2009C163 Page 2 of 4 REPORT ISSUED HISTORY Report Version Description Issued Date R00 Original Issue. Jan. 04, 2020 R01 Revised report to address comments. Jan. 05, 2020 Report No.: BTL-FCCP-3-2009C163 Page 3 of 4 1. TEST FACILITY The test facilities used to collect the test data in this report is at the location of No.3,Jinshagang 1st Road, Shixia, Dalang Town, Dongguan, Guangdong, China. BTL's Test Firm Registration Number for FCC: 357015 BTL's Designation Number for FCC: CN1240 2. GENERAL CONCULUSION According to FCC KDB447498 D01, Appendix A, SAR Test Exclusion Thresholds for 100 MHz – 6 GHz and ≤ 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(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 Appendix A - SAR Test Exclusion Thresholds for 100 MHz - 6 GHz and < 50 mm MHz 5 10 15 20 25 30 35 40 45 50 mm 150 39 77 116 155 194 232 271 310 349 387 SAR Test Exclusion Thresholds (mW) 300 27 55 82 110 137 164 192 219 246 274 450 22 45 67 89 112 134 157 179 201 224 835 16 33 49 66 82 98 115 131 148 164 900 16 32 47 63 79 95 111 126 142 158 1500 12 24 37 49 61 73 86 98 110 122 1900 11 22 33 44 54 65 76 87 98 109 2450 10 19 29 38 48 57 67 77 86 96 3600 8 16 24 32 40 47 55 63 71 79 5200 7 13 20 26 33 39 46 53 59 66 5400 6 13 19 26 32 39 45 52 58 65 5800 6 12 19 25 31 37 44 50 56 62 Report No.: BTL-FCCP-3-2009C163 Page 4 of 4 3. TABLE FOR FILED ANTENNA Ant. Manufacturer Model Name Antenna Type Connector Gain (dBi) 1 Hongyuzhi Technology LY-002 Printed N/A 2.71 Note: The antenna gain is provided by the manufacturer. 4. TEST RESULTS For BT: Frequency (MHz) Max Tune-up power (dBm) Max Tune-up power (mW) Result Limit 2441 -2.50 0.562 0.176 3 For LE: Frequency (MHz) Max Tune-up power (dBm) Max Tune-up power (mW) Result Limit 2480 2.00 1.585 0.499 3 Note: (1) Output power including tune up tolerance. (2) The maximum measured output peak power of this EUT is 1.585 mW, less than 10mW at 5mm distance. Conclusion: No SAR evaluation required since transmitter power is below FCC threshold. End of Test Report

Report No.: BTL-FCCP-1-2009C163 Page 1 of 69 FCC Radio Test Report FCC ID: QWHSD251-BT This report concerns: Original Grant Project No. : 2009C163 Equipment : Wireless Earphone Brand Name : Behringer Test Model : SD251-BT Series Model : BT251-BK Applicant : Music Tribe Commercial MY Sdn. Bhd. Address : 1-17-02, Suntech @ Penang Cybercity, LinTang Mayang Pasir 3, Bayan Baru, Pulau Pinang, Malaysia Manufacturer : Music Tribe Commercial MY Sdn. Bhd. Address : 1-17-02, Suntech @ Penang Cybercity, LinTang Mayang Pasir 3, Bayan Baru, Pulau Pinang, Malaysia Factory : iLike Electronics Co., Ltd. Address : Floor 1 and 2 of No. 2300267, 2300268, Ju Ling old village, Ju Tang Community, Guanlan Street, Longhua New District, Shenzhen, China. Date of Receipt : Sep. 28, 2020 Date of Test : Sep. 29, 2020 ~ Dec. 10, 2020 Issued Date : Jan. 04, 2020 Report Version : R00 Test Sample : Engineering Sample No.: DG202010284 for conducted, DG202010284-1 for radiated. Standard(s) : FCC Part15, Subpart C (15.247) ANSI C63.10-2013 FCC KDB 558074 D01 15.247 Meas Guidance v05r02 The above equipment has been tested and found compliance with the requirement of the relative standards by BTL Inc. Prepared by : Vincent Tan Approved by : Ethan Ma Add: No.3, Jinshagang 1st Road, Shixia, Dalang Town,Dongguan, Guangdong, China. Te l : +86-769-8318-3000 Web: www.newbtl.com Report No.: BTL-FCCP-1-2009C163 Page 2 of 69 Declaration BTL represents to the client that testing is done in accordance with standard procedures as applicable and that test instruments used has been calibrated with standards traceable to international standard(s) and/or national standard(s). BTL's reports apply only to the specific samples tested under conditions. It is manufacture’s responsibility to ensure that additional production units of this model are manufactured with the identical electrical and mechanical components. BTL shall have no liability for any declarations, inferences or generalizations drawn by the client or others from BTL issued reports. The report must not be used by the client to claim product certification, approval, or endorsement by NVLAP, NIST, A2LA, or any agency of the U.S. Government. This report is the confidential property of the client. As a mutual protection to the clients, the public and ourselves, the test report shall not be reproduced, except in full, without our written approval. BTL’s laboratory quality assurance procedures are in compliance with the ISO/IEC 17025 requirements, and accredited by the conformity assessment authorities listed in this test report. BTL is not responsible for the sampling stage, so the results only apply to the sample as received. The information, data and test plan are provided by manufacturer which may affect the validity of results, so it is manufacturer’s responsibility to ensure that the apparatus meets the essential requirements of applied standards and in all the possible configurations as representative of its intended use. Limitation For the use of the authority's logo is limited unless the Test Standard(s)/Scope(s)/Item(s) mentioned in this test report is (are) included in the conformity assessment authorities acceptance respective. Please note that the measurement uncertainty is provided for informational purpose only and are not use in determining the Pass/Fail results. Report No.: BTL-FCCP-1-2009C163 Page 3 of 69 Table of Contents Page REPORT ISSUED HISTORY 6 1 . SUMMARY OF TEST RESULTS 7 1.1 TEST FACILITY 8 1.2 MEASUREMENT UNCERTAINTY 8 1.3 TEST ENVIRONMENT CONDITIONS 8 2 . GENERAL INFORMATION 9 2.1 GENERAL DESCRIPTION OF EUT 9 2.2 DESCRIPTION OF TEST MODES 11 2.3 PARAMETERS OF TEST SOFTWARE 12 2.4 BLOCK DIAGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 13 2.5 SUPPORT UNITS 13 3 . AC POWER LINE CONDUCTED EMISSIONS TEST 14 3.1 LIMIT 14 3.2 TEST PROCEDURE 14 3.3 D E V I AT I O N FROM TEST STANDARD 14 3.4 TEST SETUP 15 3.5 EUT OPERATING CONDITIONS 15 3.6 TEST RESULTS 15 4 . RADIATED EMISSION TEST 16 4.1 LIMIT 16 4.2 TEST PROCEDURE 17 4.3 DEVIATION FROM TEST STANDARD 17 4.4 TEST SETUP 18 4.5 EUT OPERATING CONDITIONS 19 4.6 TEST RESULTS - 9 KHZ TO 30 MHZ 19 4.7 TEST RESULTS - 30 MHZ TO 1000 MHZ 19 4.8 TEST RESULTS - ABOVE 1000 MHZ 19 5 . NUMBER OF HOPPING FREQUENCY 20 5.1 LIMIT 20 5.2 TEST PROCEDURE 20 5.3 DEVIATION FROM STANDARD 20 5.4 TEST SETUP 20 5.5 EUT OPERATION CONDITIONS 20 Report No.: BTL-FCCP-1-2009C163 Page 4 of 69 Table of Contents Page 5.6 TEST RESULTS 20 6 . AVERAGE TIME OF OCCUPANCY 21 6.1 LIMIT 21 6.2 TEST PROCEDURE 21 6.3 DEVIATION FROM STANDARD 21 6.4 TEST SETUP 21 6.5 EUT OPERATION CONDITIONS 21 6.6 TEST RESULTS 21 7 . HOPPING CHANNEL SEPARATION MEASUREMENT 22 7.1 LIMIT 22 7.2 TEST PROCEDURE 22 7.3 DEVIATION FROM STANDARD 22 7.4 TEST SETUP 22 7.5 EUT OPERATION CONDITIONS 22 7.6 TEST RESULTS 22 8 . BANDWIDTH TEST 23 8.1 LIMIT 23 8.2 TEST PROCEDURE 23 8.3 DEVIATION FROM STANDARD 23 8.4 TEST SETUP 23 8.5 EUT OPERATION CONDITIONS 23 8.6 TEST RESULTS 23 9 . MAXIMUM OUTPUT POWER 24 9.1 LIMIT 24 9.2 TEST PROCEDURE 24 9.3 DEVIATION FROM STANDARD 24 9.4 TEST SETUP 24 9.5 EUT OPERATION CONDITIONS 24 9.6 TEST RESULTS 24 10 . CONDUCTED SPURIOUS EMISSION 25 10.1 LIMIT 25 10.2 TEST PROCEDURE 25 10.3 DEVIATION FROM STANDARD 25 10.4 TEST SETUP 25 Report No.: BTL-FCCP-1-2009C163 Page 5 of 69 Table of Contents Page 10.5 EUT OPERATION CONDITIONS 25 10.6 TEST RESULTS 25 11 . MEASUREMENT INSTRUMENTS LIST 26 12 . EUT TEST PHOTO 28 APPENDIX A - AC POWER LINE CONDUCTED EMISSIONS 32 APPENDIX B - RADIATED EMISSION - 9 KHZ-30 MHZ 35 APPENDIX C - RADIATED EMISSION - 30 MHZ TO 1000 MHZ 40 APPENDIX D - RADIATED EMISSION - ABOVE 1000 MHZ 43 APPENDIX E - NUMBER OF HOPPING FREQUENCY 56 APPENDIX F - AVERAGE TIME OF OCCUPANCY 58 APPENDIX G - HOPPING CHANNEL SEPARATION MEASUREMENT 61 APPENDIX H - BANDWIDTH 63 APPENDIX I - MAXIMUM OUTPUT POWER 65 APPENDIX J - CONDUCTED SPURIOUS EMISSION 67 Report No.: BTL-FCCP-1-2009C163 Page 6 of 69 REPORT ISSUED HISTORY Report Version Description Issued Date R0…

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Report No.: BTL-FCCP-2-2009C163 Page 24 of 60 10. EUT TEST PHOTO AC Power Line Conducted Emissions Test Photos Report No.: BTL-FCCP-2-2009C163 Page 25 of 60 Radiated Emissions Test Photos 9 kHz to 30 MHz Report No.: BTL-FCCP-2-2009C163 Page 26 of 60 Radiated Emissions Test Photos 30 MHz to 1000 MHz Report No.: BTL-FCCP-2-2009C163 Page 27 of 60 Radiated Emissions Test Photos Above 1 GHz