2ARN3BY-AP4True Wireless Earbuds

Sound Prompt Warranty Description Product Parameters Hearing Protection Safety Precautions Common Problem Contact Us ① Do not use it too long under high volume as it may damage your hearing ② Do not use too high volume in case surrounding sound cannot be heard ① Please avoid heavy drop or bump ② Please use original or qualified charging cable. ③ Do not disassemble or modify the earbuds yourself to prevent damage or danger. ④ Please avoid the earbuds from water contact and keep it dry ⑤ Please keep the earbuds away from children as it may damage their hearing ⑥ Do not use earbuds in lightning weather to prevent accidents ⑦ Wipe with a soft, dry cloth to avoid irritating chemicals or strong detergents. ⑧ Do not use this product in severely hot / wet / corrosive environments. ① Contact number: 4006131096. ② Official website: www.jiayz.com. ③ Address: Building A16, Silicon Valley Power Intelligent Terminal Industrial Park, Guanlan Dafu Industrial District, Shenzhen Q: The earbuds cannot turn on automatically? A: ① Check if the charging case has power. ② Check if the earbuds are low powered ③ Check if the earbuds can be turned on manually Q: Bluetooth signal is not stable? A: ① Check if there's electromagnetic interference surrounded ② Check if the earbuds are too far from device ③ Restart the phone, to prevent the problem of mobile phone signal instability. ④ Turn off the wifi and try again Q: How to tell if the earbuds are fully charged? A: ① The earbuds charging time is about 1.5 hour. ② When fully charged, the earbuds blue light will steady for 7s and then turn off Q: The earbuds cannot be charged? A: ① Make sure the earbuds charging contacts are clean ② Whether the earbuds are placed in the charging case. ③ Whether the charging case has sufficient power. Q: How to adjust the earbuds volume? A: ① Long press the left earbud for 1.5s to decrease volume, long press right earbud for 1.5s to increase volume. ② When you adjust the volume, most Android phone won’t display the change, you need to feel the volume change yourself(There's 15 grades volume in total) Q: How to connect earbuds with device? A: ① Turn on the earbuds and wait until blue indicator lights flash every 0.5s, which means earbuds is pending for connection ② Turn on bluetooth function from your device and connect bluetooth named “BY-AP1” Q: No sound from the earbuds? A: ① Check if the earbuds are connected to the mobile phone, and whether the media audio is selected. ② Check if the earbuds volume is adjusted to the mute state. ③ Check if there's electromagnetic interference surrounded or if the earbuds are too far from device. 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 receiving antenna. - Increase the separation between the equipment and receiver. -Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. -Consult the dealer or an experienced radio/TV technician for help Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 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. Warranty Service 12-Month Quality WarrantyLifetime Technical Service Support ① Within 1 year since the customer purchase this product, we will provide free warranty service in case the damage is caused during normal use. ② Under the following circumstances, the free warranty will be refused. We will however provide free repair service but charging fees for parts. A. The product has been mishandled, inadvertently used, or damaged due to irresistible movement. B. The product is disassembled and repaired privately without the company's permission. C. The head unit is in the form of debris or impact, which causes the diaphragm to deform, crush, and soak for a long time. Damage to the casing, deformation, etc. D. The using time exceed 1 year. ③ The free service provided by this warranty does not include product accessories and other packaging, gifts products and so on. R BY-AP4 Package ContentProduct StructureEarplugs WearingPower ON / OFF Bluetooth Pairing Earbud x 2Charging Case x 1 Earplugs ( Pairs ) x 3Type-C Charging Cable x 1 Warranty Card x 1 Instruction Manual x 1User Guide x 1 Carrying Bag x 1 R S M L Instruction Manual Warranty Card User Guide Wireless Charger True Wireless Stereo Earbuds Earbuds Indicator Microphone Charging Pins Power Indicators (Charging case) USB Type-C Charging Port Built-in Wireless Charging Induction Coil Left Ear Please choose the pair of earplug with most appropriate size. Insert the earbuds into ear canals as shown above, rotate it to your most suitable, comfortable position. Right Ear Power ON / OFF Manually： Auto Power ON: Open the case, and the earbuds turn on automatically Auto Power OFF: ① Put the earbuds back to the case and close the cover. ② Haven’t operate or connect the earbuds beyond 5 minutes. ③ Being in ultra-low battery status. ①Turn ON: long press left / right earbud for 2.5 seconds， left / ri…

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Shenzhen Jiayz photo industrial., Ltd Agent Authorization Company: Shenzhen Jiayz photo industrial ., Ltd. Address: A16 Builing, Intelligent Terminal Industrial Park of Sililcon Valley Power, Guanlan, Longhua District, Shenzhen, China Product Name: True Wireless Earbuds Model Number(s): BY-AP4 Product Description: True Wireless Earbuds 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: 2020-07-06 Name: Michael zhao Company: Shenzhen Jiayz photo industrial., Ltd

Shenzhen Jiayz photo industrial., Ltd Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2020-07-06 Subject; Request for Confidentiality FCC ID: 2ARN3BY-AP4 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 Parts List Operational Description Tune-up Procedure 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); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to 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, Shenzhen Jiayz photo industrial., Ltd Shenzhen Jiayz photo industrial., Ltd Contact person: Michael zhao

External Photos WHOLE VIEW OF EUT TOP VIEW OF EUT BOTTOM VIEW OF EUT FRONT VIEW OF EUT BACK VIEW OF EUT LEFT VIEW OF EUT RIGHT VIEW OF EUT Charging Dock TOP VIEW OF EUT BOTTOM VIEW OF EUT FRONT VIEW OF EUT BACK VIEW OF EUT LEFT VIEW OF EUT RIGHT VIEW OF EUT

FCC ID Label Location Size 40mm*20mm FCC ID: 2ARN3BY-AP4

Internal Photos Left OPEN VIEW OF EUT VIEW OF BATTERY INTERNAL VIEW OF EUT-1 INTERNAL VIEW OF EUT-2 INTERNAL VIEW OF EUT-3 BT Antenna Right OPEN VIEW OF EUT VIEW OF BATTERY INTERNAL VIEW OF EUT-1 INTERNAL VIEW OF EUT-2 BT Antenna INTERNAL VIEW OF EUT-3

RF EXPOSURE EVALUATION 1. PRODUCT INFORMATION Product Description True Wireless Earbuds Model Name BY-AP4 FCC ID 2ARN3BY-AP4 2. EVALUATION METHOD According to 447498 D01 General RF Exposure Guidance v05 The 1-g 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 3. CALCULATION BR/EDR: P t =8.667dBm=7.36mW The value of the Maximum output power P t is referred to the test report of the CFR47 §15.247. The result for RF exposure evaluation SAR=(7.36mW /5mm) .[√2.480GHz)]=2.31<3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. 4. CONCLUSION The SAR evaluation is not required.

Page 1 of 76 FCC Test Report Report No.: AGC09691200602FE03 FCC ID : 2ARN3BY-AP4 APPLICATION PURPOSE : Original Equipment PRODUCT DESIGNATION : True Wireless Earbuds BRAND NAME : BOYA MODEL NAME : BY-AP4 APPLICANT : Shenzhen Jiayz photo industrial ., Ltd. DATE OF ISSUE : Jul. 01, 2020 STANDARD(S) : FCC Part 15.247 REPORT VERSION : V1.0 Attestation of Global Compliance (Shenzhen) Co., Ltd CAUTION: This report shall not be reproduced except in full without the written permission of the test laboratory and shall not be quoted out of context. Report No.: AGC09691200602FE03 Page 2 of 76 REPORT REVISE RECORD Report Version Revise Time Issued Date Valid Version Notes V1.0 / Jul. 01, 2020 Valid Initial Release Report No.: AGC09691200602FE03 Page 3 of 76 TABLE OF CONTENTS 1. VERIFICATION OF CONFORMITY ............................................................................................................... 5 2. GENERAL INFORMATION ............................................................................................................................ 6 2.1. PRODUCT DESCRIPTION ..................................................................................................................... 6 2.2. TABLE OF CARRIER FREQUENCYS ..................................................................................................... 6 2.3. RECEIVER INPUT BANDWIDTH ............................................................................................................ 7 2.4. EXAMPLE OF A HOPPING SEQUENCY IN DATA MODE ....................................................................... 7 2.5. EQUALLY AVERAGE USE OF FREQUENCIES AND BEHAVIOUR ........................................................ 7 2.6. RELATED SUBMITTAL(S) / GRANT (S) .................................................................................................. 8 2.7. TEST METHODOLOGY .......................................................................................................................... 8 2.8. SPECIAL ACCESSORIES ....................................................................................................................... 8 2.9. EQUIPMENT MODIFICATIONS .............................................................................................................. 8 3. MEASUREMENT UNCERTAINTY ................................................................................................................. 9 4. DESCRIPTION OF TEST MODES ............................................................................................................... 10 5. SYSTEM TEST CONFIGURATION ............................................................................................................. 11 5.1. CONFIGURATION OF EUT SYSTEM .................................................................................................... 11 5.2 EQUIPMENT USED IN TESTED SYSTEM .............................................................................................. 11 5.3. SUMMARY OF TEST RESULTS ............................................................................................................. 11 6. TEST FACILITY ........................................................................................................................................... 12 7. PEAK OUTPUT POWER ............................................................................................................................. 13 7.1. MEASUREMENT PROCEDURE ........................................................................................................... 13 7.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) ................................................................... 13 7.3. LIMITS AND MEASUREMENT RESULT ............................................................................................... 14 8. 20DB BANDWIDTH ..................................................................................................................................... 20 8.1. MEASUREMENT PROCEDURE ........................................................................................................... 20 8.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) ................................................................... 20 8.3. LIMITS AND MEASUREMENT RESULTS ............................................................................................. 21 9. CONDUCTED SPURIOUS EMISSION ........................................................................................................ 27 9.1. MEASUREMENT PROCEDURE ........................................................................................................... 27 9.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) ................................................................... 27 9.3. MEASUREMENT EQUIPMENT USED .................................................................................................. 27 Report No.: AGC09691200602FE03 Page 4 of 76 9.4. LIMITS AND MEASUREMENT RESULT ............................................................................................... 27 10. RADIATED EMISSION ............................................................................................................................... 40 10.1. MEASUREMENT PROCEDURE ......................................................................................................... 40 10.2. TEST SETUP ....................................................................................................................................... 42 10.3. LIMITS AND MEASUREMENT RESULT ............................................................................................. 43 10.4. TEST RESULT ..................................................................................................................................... 43 11. NUMBER OF HOPPING FREQUENCY ..................................................................................................... 53 11.1. MEASUREMENT PROCEDUR…

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Report No.: AGC09691200602FE03 Page 58 of 76 13. FREQUENCY SEPARATION 13.1. MEASUREMENT PROCEDURE The EUT shall have its hopping function enabled. Use the following spectrum analyzer settings: 1. Span: Wide enough to capture the peaks of two adjacent channels. 2. RBW: Start with the RBW set to approximately 30% of the channel spacing; adjust as necessary to best identify the center of each individual channel. 3. Video (or average) bandwidth (VBW) ≥ RBW. 4. Sweep: Auto. e) Detector function: Peak. f) Trace: Max hold. g) Allow the trace to stabilize. Use the marker-delta function to determine the separation between the peaks of the adjacent channels. 13.2. TEST SETUP (BLOCK DIAGRAM OF CONFIGURATION) Same as described in section 6.2 13.3. MEASUREMENT EQUIPMENT USED The same as described in section 6.3 13.4. LIMITS AND MEASUREMENT RESULT CHANNEL CHANNEL SEPARATION LIMIT RESULT MHz KHz Pass CH01-CH02 1003 2/3 20 dB BW TEST PLOT FOR FREQUENCY SEPARATION Note: The GFSK modulation is the worst case and recorded in the report. Report No.: AGC09691200602FE03 Page 59 of 76 14. FCC LINE CONDUCTED EMISSION TEST 14.1. LIMITS OF LINE CONDUCTED EMISSION TEST Frequency Maximum RF Line Voltage Q.P.( dBuV) Average( dBuV) 150kHz~500kHz 66-56 56-46 500kHz~5MHz 56 46 5MHz~30MHz 60 50 Note: 1. The lower limit shall apply at the transition frequency. 2. The limit decreases linearly with the logarithm of the frequency in the range 0.15 MHz to 0.50 MHz. 14.2. BLOCK DIAGRAM OF LINE CONDUCTED EMISSION TEST EUT & Support Units Report No.: AGC09691200602FE03 Page 60 of 76 14.3. PRELIMINARY PROCEDURE OF LINE CONDUCTED EMISSION TEST 1. The equipment was set up as per the test configuration to simulate typical actual usage per the user’s manual. When the EUT is a tabletop system, a wooden table with a height of 0.8 meters is used and is placed on the ground plane as per ANSI C63.10 (see Test Facility for the dimensions of the ground plane used). When the EUT is a floor-standing equipment, it is placed on the ground plane which has a 3-12 mm non-conductive covering to insulate the EUT from the ground plane. 2. Support equipment, if needed, was placed as per ANSI C63.10. 3. All I/O cables were positioned to simulate typical actual usage as per ANSI C63.10. 4. All support equipments received AC120V/60Hz power from a LISN, if any. 5. The EUT received DC 3.3V power from control board which received AC120V/60Hz power from a LISN. 6. The test program was started. Emissions were measured on each current carrying line of the EUT using a spectrum Analyzer / Receiver connected to the LISN powering the EUT. The LISN has two monitoring points: Line 1 (Hot Side) and Line 2 (Neutral Side). Two scans were taken: one with Line 1 connected to Analyzer / Receiver and Line 2 connected to a 50 ohm load; the second scan had Line 1 connected to a 50 ohm load and Line 2 connected to the Analyzer / Receiver. 7. Analyzer / Receiver scanned from 150 kHz to 30MHz for emissions in each of the test modes. 8. During the above scans, the emissions were maximized by cable manipulation. 9. The test mode(s) were scanned during the preliminary test. Then, the EUT configuration and cable configuration of the above highest emission level were recorded for reference of final testing. 14.4. FINAL PROCEDURE OF LINE CONDUCTED EMISSION TEST 1. EUT and support equipment was set up on the test bench as per step 2 of the preliminary test. 2. A scan was taken on both power lines, Line 1 and Line 2, recording at least the six highest emissions. Emission frequency and amplitude were recorded into a computer in which correction factors were used to calculate the emission level and compare reading to the applicable limit. If EUT emission level was less –2dB to the A.V. limit in Peak mode, then the emission signal was re-checked using Q.P and Average detector. 3. The test data of the worst case condition(s) was reported on the Summary Data page. 14.5. TEST RESULT OF LINE CONDUCTED EMISSION TEST N/A Note:The EUT is powered by battery. Report No.: AGC09691200602FE03 Page 61 of 76 APPENDIX A: PHOTOGRAPHS OF TEST SETUP RADIATED EMISSION TEST SETUP BELOW 1GHZ RADIATED EMISSION TEST SETUP ABOVE 1GHZ Report No.: AGC09691200602FE03 Page 62 of 76 APPENDIX B: PHOTOGRAPHS OF EUT WHOLE VIEW OF EUT TOP VIEW OF EUT BOTTOM VIEW OF EUT Report No.: AGC09691200602FE03 Page 63 of 76 FRONT VIEW OF EUT Report No.: AGC09691200602FE03 Page 64 of 76 BACK VIEW OF EUT LEFT VIEW OF EUT Report No.: AGC09691200602FE03 Page 65 of 76 RIGHT VIEW OF EUT Left OPEN VIEW OF EUT Report No.: AGC09691200602FE03 Page 66 of 76 VIEW OF BATTERY INTERNAL VIEW OF EUT-1 Report No.: AGC09691200602FE03 Page 67 of 76 INTERNAL VIEW OF EUT-2 INTERNAL VIEW OF EUT-3 BT Antenna Report No.: AGC09691200602FE03 Page 68 of 76 Right OPEN VIEW OF EUT VIEW OF BATTERY Report No.: AGC09691200602FE03 Page 69 of 76 INTERNAL VIEW OF EUT-1 INTERNAL VIEW OF EUT-2 BT Antenna Report No.: AGC09691200602FE03 Page 70 of 76 INTERNAL VIEW OF EUT-3 Charging Dock TOP VIEW OF EUT Report No.: AGC09691200602FE03 Page 71 of 76 BOTTOM VIEW OF EUT FRONT VIEW OF EUT Report No.: AGC09691200602FE03 Page 72 of 76 BACK VIEW OF EUT LEFT VIEW OF EUT Report No.: AGC09691200602FE03 Page 73 of 76 RIGHT VIEW OF EUT VIEW OF EUT(port)-1 Report No.: AGC09691200602FE03 Page 74 of 76 VIEW OF EUT(port)-2 OPEN VIEW OF EUT Report No.: AGC09691200602FE03 Page 75 of 76 VIEW OF BATTERY INTERNAL VIEW OF EUT-1 Report No.: AGC09691200602FE03 Page 76 of 76 INTERNAL VIEW OF EUT-2 WPT Antenna ----END OF REPORT----

Test Setup Photos RADIATED EMISSION TEST SETUP BELOW 1GHZ RADIATED EMISSION TEST SETUP ABOVE 1GHZ