2AZLD-ARA4TWS Bluetooth Headset

Thank you for purchasing the AIHOOR A4 True Wireless Stereo earbuds. Please read this user manual carefully and keep it for future reference. If you need any assistance, please contact our support team with your product model number and Amazon order number. In the Box Ear-tips Charging Case Earbuds User Manual USB-C Charging Cable Quick Start Guide Specifications Product Number Bluetooth Version Charging Time Battery Life Earphones Impedance Maximum Output Power Frequency Range Microphone Sensitivity Battery Capacity Bluetooth Effective Distance Product Weight Charging Voltage Waterpoof Rating AIHOOR A4 5.1 ≈2h ≈20h (with case) ≈5h ( earbuds only) 32Ω 5mW 20Hz-20KHz -38dB@1KHz 500mAh 10m 45g/4g (each earbud) DC 5V IPX4 A2DP / AVRCP/HSP/ HFP Bluetooth Protocol PRODUCT DETAILS Please charge the earbuds and the charging case for at least 15 minutes for the first time. before first use. LED Indicator Multi-Function Touch Panel LED Charging IndicatorUSB-C Charging Port LISTENING COMFORT Choose the ear-tips that fit your ears beast Choose the ear-tip with the most comfortable fit and best seal. To change an ear-tip, gently pull it off from the earbud and press on the new one. Wearing the Earbuds Gently insert the earbuds into the ear and adjust to a comfortable position by rotating them. R is for the right ear, and L for the left. BATTERY LIFE AND CHARGING Battery life In Bluetooth mode the buds can last for 5 hours of continuous play. Using the charging case, this can be extended to 25 hours. Charging the earbuds Place the earbuds in the charging case and they will automatically shut down and begin charging. Power display The red light is on when the battery is 0-30% remaining , the yellow light is on when the battery is 31%-70% remaining, and the green light is on when the battery is 71%-100% remaining. Charging the charging case TOUCH CONTROLS Touch Control Music Play/Pause Next Track ANC ON /OFF Answer Hang Up Decline Call Activate Voice Assistant Left ear Right ear TapTap Double-tap TapTap Long-press 2s Long-press 2s Long-press 2s Long-press 2s Long-press 2sLong-press 2s Triple-tap Adjust music and call volume from your device only Triple-tap AUTOMATIC CONNECTION Automatic remote connection 1. When you turn on the earbuds, they will automatically reconnect to the lastpaired device or enter pairing mode if no paired device is found. 2. In pairing mode, the earbuds will automatically turn off after 5 minutes if no devices are paired. 3. Place the earbuds in the charging case then close the charging case,they will automati- cally shut down and begin charging. 4. If the Bluetooth connection is lost, they will automatically begin pairing. Paring Starting with the earbuds in the case: 1. Take the left and right earbuds out of the case. They will automatically turn on and connect with each other within 3 seconds. 2. After the earbuds have connected each other successfully, the LED light of flashing red and blue for paring. 3. Turn on the pairing function on the device to be paired with the earbuds 4. From the list of available devices, find and select "AIHOOR A4 " from the list of available devices. 5. If the earbuds have connected with your device, the earbuds start flashing blue for one second. 6. If a code or PIN code is required for pairing, please enter "0000" Reset You might need to reset your earbuds if you experience any connectivity problems or function issues. 1 Place the earbuds in the charging case and leave the case open. 2Press and hold the button on the side of the case for 6 seconds until the LED indicators flash red NOTE: If one of the earbuds has no sound output, put both earbuds back into the charging case and take them out again. The maximum wireless operating range is 10m (33ft). If you exceed this range, the earbuds will disconnect from your paired device. The connection will be re-established if you re-enter the wireless range within 5 minutes. The earbuds will automatically reconnect to the last-paired device. To connect with other devices, repeat the previous pairing steps. SAFETY INSTRUCTIONS 1. Do not place the earbuds in extremely high or low ambient temperatures for an extended period of time. Extreme temperatures will cause the device to deform. 2. Use electronic equipment with caution during thunderstorms. 3. This product contains small parts which could cause harm if swallowed. Keep out of the reach of children. 4. Using the earbuds for a long time at high volume may affect your hearing. Make sure to use an appropriate level of volume. BATTERY WARNING This product contains a lithium battery. Please do not disassemble, strike, crush, or place the product into contact with flames. Do not expose to high temperatures or direct sunlight for a prolonged period. If there is any swelling, leakage, odor, or any other abnormality in the battery compartment of the product, cease use immediately. Please dispose of used batteries properly and in accordance with local regulations. READ ALL INSTRUCTIONS BEFORE USE AND SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE 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 o…

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Shenzhen Ausounds Intelligence Co.,Ltd. Agent Authorization Company: Shenzhen Ausounds Intelligence Co.,Ltd. Address: 606B, 6th Floor, Xuyuan Building, No. 5003 Longgang Avenue, Longgang District, Shenzhen China Product Name: TWS Bluetooth Headset Trade Mark: AIHOOR Model Number(s): AIHOOR A4 FCC ID: 2AZLD-ARA4 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: 2021-07-26 Name: youjun pu Title: Quality manager Company: Shenzhen Ausounds Intelligence Co.,Ltd.

Shenzhen Ausounds Intelligence Co.,Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2021-07-26 Subject; Request for Confidentiality FCC ID: 2AZLD-ARA4 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); 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, Signature: Name: youjun pu Title: Quality manager

Shenzhen LCS Compliance Testing Laboratory Ltd.. FCC ID: 2AZLD-ARA4 This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 1 External Photos of the EUT Fig.1 Fig.2 Shenzhen LCS Compliance Testing Laboratory Ltd.. FCC ID: 2AZLD-ARA4 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.3 Fig.4 Shenzhen LCS Compliance Testing Laboratory Ltd.. FCC ID: 2AZLD-ARA4 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: 2AZLD-ARA4 This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 4 of 4 Fig.7 Fig.8 Shenzhen LCS Compliance Testing Laboratory Ltd.. FCC ID: 2AZLD-ARA4 This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 5 of 5 Fig.9 Fig.10 Shenzhen LCS Compliance Testing Laboratory Ltd.. FCC ID: 2AZLD-ARA4 This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 6 of 6 Fig.11 Fig.12 Shenzhen LCS Compliance Testing Laboratory Ltd.. FCC ID: 2AZLD-ARA4 This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 7 of 7 Fig.13 Fig.14 Shenzhen LCS Compliance Testing Laboratory Ltd.. FCC ID: 2AZLD-ARA4 This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 8 of 8 Fig.15 Fig.16

Shenzhen LCS Compliance Testing Laboratory Ltd.. FCC ID: 2AZLD-ARA4 _____________________________________________________________________________________________________ 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: L2.0m x 2.0cm) Material: Tagboard Glue: adhesive sticker Font color: Blue Label color: White Label Location TWS Bluetooth Headset Model No.: AIHOOR A4 FCC ID: 2AZLD-ARA4

Shenzhen LCS Compliance Testing Laboratory Ltd.. FCC ID: 2AZLD-ARA4 This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 6 Internal Photos of the EUT Fig.1 Fig.2 Shenzhen LCS Compliance Testing Laboratory Ltd.. FCC ID: 2AZLD-ARA4 This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 2 of 6 Fig.3 Fig.4 Shenzhen LCS Compliance Testing Laboratory Ltd.. FCC ID: 2AZLD-ARA4 This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 3 of 6 Fig.5 Fig.6 Shenzhen LCS Compliance Testing Laboratory Ltd.. FCC ID: 2AZLD-ARA4 This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 4 of 6 Fig.7 Fig.8 Shenzhen LCS Compliance Testing Laboratory Ltd.. FCC ID: 2AZLD-ARA4 This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 5 of 6 Fig.9 Fig.10 BT Antenna Shenzhen LCS Compliance Testing Laboratory Ltd.. FCC ID: 2AZLD-ARA4 This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 6 of 6 Fig.11 Fig.12

Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD‐ARA4 ________________________________________________________________________ ___ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 3 FCC RF Exposure Evaluation 1. Product Information FCC ID : 2AZLD‐ARA4 Product name : TWS Bluetooth Headset Test Model : AIHOOR A4 Power Supply : Input: DC 5V, 500mA Headset: DC 3.7V by Li‐ion Battery(40mAh) Charging Case: DC 3.7V By Li‐ion Battery(400mAh) Hardware Version : Y126_V1.2 Software Version : 8773BFE_L_1751F2_MCU44_DSP0X044_anc9.3 Bluetooth : 2402‐2480MHz Channel Number : 79 channels for Bluetooth V5.1(DSS) Channel Spacing : 1MHz for Bluetooth V5.1(DSS) Modulation Type : GFSK , π/4‐DQPSK, 8‐DPSK for Bluetooth V5.1(DSS) Bluetooth Version : V5.1 Antenna Type : PIFA Antenna Antenna Gain : 1.56dBi Exposure category : General population/uncontrolled environment EUT Type : Production Unit Device Type : Portable Device 2. Evaluation method and Limit 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 separaƟon 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 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD‐ARA4 ________________________________________________________________________ ___ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 2 of 3 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. 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. 3. 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 4. Conducted Power Results <BT Classics> Mode Channel Frequency (MHz)Peak Conducted Output Power (dBm) GFSK 0 24023.03 39 24414.26 78 24802.85 π/4DQPSK 0 24022.12 39 24413.37 78 24802.01 8DPSK 0 24022.23 39 24413.46 78 24802.24 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD‐ARA4 ________________________________________________________________________ ___ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 3 of 3 5. Manufacturing Tolerance <BT Classics> GFSK (Peak) Channel Channel 0Channel 39Channel 78 Target (dBm) 3.04.02.0 Tolerance ±(dB)1.01.01.0 π/4DQPSK (Peak) Channel Cha…

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Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 1 of 36 Appendix A RF Test Data for BT V5.1(DSS) (Conducted Measurement) Product Name: TWS Bluetooth Headset Trade Mark: AIHOOR Test Model: AIHOOR A4 Environmental Conditions Temperature: 21.6°C Relative Humidity: 52.7% ATM Pressure: 100.0 kPa Test Engineer: Jay Li Supervised by: Li Huan A.1 Maxmum Conducted Peak Output Power Test Result TestMode Antenna Channel Result[dBm] Limit[dBm] Verdict DH5 Ant1 24023.03≤20.97 PASS 24414.26≤20.97 PASS 24802.85≤20.97 PASS 2DH5 Ant1 24022.12≤20.97 PASS 24413.37≤20.97 PASS 24802.01≤20.97 PASS 3DH5 Ant1 24022.23≤20.97 PASS 24413.46≤20.97 PASS 24802.24≤20.97 PASS Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 2 of 36 Test Graphs DH5_Ant1_2402 DH5_Ant1_2441 DH5_Ant1_2480 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 3 of 36 2DH5_Ant1_2402 2DH5_Ant1_2441 2DH5_Ant1_2480 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 4 of 36 3DH5_Ant1_2402 3DH5_Ant1_2441 3DH5_Ant1_2480 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 5 of 36 A.2 20dB Bandwidth Test Result TestMode Antenna Channel 20db EBW[MHz] FL[MHz] FH[MHz] Limit[MHz] Verdict DH5 Ant1 2402 1.0322401.4692402.501 --- PASS 2441 1.0202440.4782441.498 --- PASS 2480 1.0352479.4692480.504 --- PASS 2DH5 Ant1 2402 1.3232401.3402402.663 --- PASS 2441 1.3352440.3312441.666 --- PASS 2480 1.3652479.3222480.687 --- PASS 3DH5 Ant1 2402 1.3022401.3492402.651 --- PASS 2441 1.3472440.3252441.672 --- PASS 2480 1.2992479.3492480.648 --- PASS Test Graphs DH5_Ant1_2402 DH5_Ant1_2441 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 6 of 36 DH5_Ant1_2480 2DH5_Ant1_2402 2DH5_Ant1_2441 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 7 of 36 2DH5_Ant1_2480 3DH5_Ant1_2402 3DH5_Ant1_2441 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 8 of 36 3DH5_Ant1_2480 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 9 of 36 A.3 Carrier Frequency Separation Test Result TestMode Antenna Channel Result[dBm] Limit[dBm] Verdict DH5 Ant1 Hop0.91≥0.690 PASS 2DH5 Ant1 Hop1.002≥0.910 PASS 3DH5 Ant1 Hop1.324≥0.898 PASS Test Graphs DH5_Ant1_Hop 2DH5_Ant1_Hop Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 10 of 36 3DH5_Ant1_Hop Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 11 of 36 A.4 Hopping Channel Number Test Result TestMode Antenna Channel Result[Num] Limit[Num] Verdict DH5 Ant1 Hop79≥15 PASS 2DH5 Ant1 Hop79≥15 PASS 3DH5 Ant1 Hop79≥15 PASS Test Graphs DH5_Ant1_Hop 2DH5_Ant1_Hop Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 12 of 36 3DH5_Ant1_Hop Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 13 of 36 A.5 Dwell Time Test Result TestMode Antenna Channel BurstWidth [ms] TotalHops [Num] Result[s] Limit[s] Verdict DH5 Ant1 Hop 2.881100.317 ≤0.4 PASS 2DH5 Ant1 Hop 3.08500.154 ≤0.4 PASS 3DH5 Ant1 Hop 2.891200.346 ≤0.4 PASS Test Graphs DH5_Ant1_Hop DH5_Ant1_Hop Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 14 of 36 2DH5_Ant1_Hop 2DH5_Ant1_Hop 3DH5_Ant1_Hop Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 15 of 36 3DH5_Ant1_Hop Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 16 of 36 A.6 RF Conducted Spurious Emissions Test Result TestMode Antenna Channel FreqRange [MHz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict DH5 Ant1 2402 Reference2.582.58--- PASS 30~10002.58-59.93 ≤-17.42 PASS 1000~265002.58-47.45 ≤-17.42 PASS 2441 Reference3.183.18--- PASS 30~10003.18-60.35 ≤-16.82 PASS 1000~265003.18-47.23 ≤-16.82 PASS 2480 Reference2.372.37--- PASS 30~10002.37-59.57 ≤-17.63 PASS 1000~265002.37-47.5≤-17.63 PASS 2DH5 Ant1 2402 Reference0.880.88--- PASS 30~10000.88-59.23 ≤-19.12 PASS 1000~265000.88-47.98 ≤-19.12 PASS 2441 Reference-0.85-0.85--- PASS 30~1000-0.85-59.13 ≤-20.85 PASS 1000~26500-0.85-47.32 ≤-20.85 PASS 2480 Reference1.121.12--- PASS 30~10001.12-60.34 ≤-18.88 PASS 1000~265001.12-47.37 ≤-18.88 PASS 3DH5 Ant1 2402 Reference1.041.04--- PASS 30~10001.04-60.06 ≤-18.96 PASS 1000~265001.04-47.67 ≤-18.96 PASS 2441 Reference2.302.30--- PASS 30~10002.30-58.86 ≤-17.7 PASS 1000~265002.30-46.69 ≤-17.7 PASS 2480 Reference0.980.98--- PASS 30~10000.98-59.21 ≤-19.02 PASS 1000~265000.98-47.24 ≤-19.02 PASS Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 17 of 36 Test Graphs DH5_Ant1_2402_0~Reference DH5_Ant1_2402_30~1000 DH5_Ant1_2402_1000~26500 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 18 of 36 DH5_Ant1_2441_0~Reference DH5_Ant1_2441_30~1000 DH5_Ant1_2441_1000~26500 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 19 of 36 DH5_Ant1_2480_0~Reference DH5_Ant1_2480_30~1000 DH5_Ant1_2480_1000~26500 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 20 of 36 2DH5_Ant1_2402_0~Reference 2DH5_Ant1_2402_30~1000 2DH5_Ant1_2402_1000~26500 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 21 of 36 2DH5_Ant1_2441_0~Reference 2DH5_Ant1_2441_30~1000 2DH5_Ant1_2441_1000~26500 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA Page 22 of 36 2DH5_Ant1_2480_0~Reference 2DH5_Ant1_2480_30~1000 2DH5_Ant1_2480_1000~26500 Shen…

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Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 37 FCC TEST REPORT FOR Shenzhen Ausounds Intelligence Co., Ltd. TWS Bluetooth Headset Test Model: AIHOOR A4 Prepared for : Shenzhen Ausounds Intelligence Co., Ltd. Address : 606B, 6th Floor, Xuyuan Building, No. 5003 Longgang Avenue, Longgang 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 : July 06, 2021 Number of tested samples : 2 Sample No. : 210618017A-1, 210618017A-2 Serial number : Prototype Date of Test : July 06, 2021 ~ July 21, 2021 Date of Report : July 22, 2021 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 2 of 37 FCC TEST REPORT FCC CFR 47 PART 15 C (15.247) Report Reference No. ................. : LCS210618017AEA Date of Issue .................................. : July 22, 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 Ausounds Intelligence Co., Ltd. Address .......................................... : 606B, 6th Floor, Xuyuan Building, No. 5003 Longgang Avenue, Longgang 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. ................. : TWS Bluetooth Headset Trade Mark ..................................... : AIHOOR Test Model ..................................... : AIHOOR A4 Ratings ........................................... : Input: DC 5V, 500mA Headset: DC 3.7V by Li-ion Battery(40mAh) Charging Case: DC 3.7V By Li-ion Battery(400mAh) Result .......................................... : Positive Tested by: Compiled by: Approved by: Ray Yang/ Administrators Jin Wang/ Technique principal Gavin Liang / Manager Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 3 of 37 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. Test Report No. : LCS210618017AEA July 22, 2021 Date of issue Test Model.............................. : AIHOOR A4 EUT......................................... : TWS Bluetooth Headset Applicant............................... : Shenzhen Ausounds Intelligence Co., Ltd. Address................................... : 606B, 6th Floor, Xuyuan Building, No. 5003 Longgang Avenue, Longgang District, Shenzhen, China Telephone............................... : / Fax.......................................... : / Manufacturer......................... : Shenzhen Ausounds Intelligence Co., Ltd. Address................................... : 606B, 6th Floor, Xuyuan Building, No. 5003 Longgang Avenue, Longgang District, Shenzhen, China Telephone............................... : / Fax.......................................... : / Factory................................... : Shenzhen Ausounds Intelligence Co., Ltd. Address................................... : 606B, 6th Floor, Xuyuan Building, No. 5003 Longgang Avenue, Longgang District, Shenzhen, China Telephone............................... : / Fax.......................................... : / Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 4 of 37 Revision History Revision Issue Date Revisions Revised By 000 July 22, 2021 Initial Issue Gavin Liang Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2AZLD-ARA4 Report No.: LCS210618017AEA This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 5 of 37 TABLE OF CONTENTS Description Page 1.GENERAL INFORMATION .....…

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