2AT9T-UBUDSINSIDETRUE WIRELESS EARBUDS

FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this 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. This device and its antenna(s) must not be co-located or operating in conjunction with any other antenna or transmitter. 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. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction Note: Since the size of the prototype is too small to place the FCC ID, the FCC ID number is marked on the Mobile phone. FCC ID:2AT9T-UBUDSINSIDE

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TRUE WIRELESS EARBUDS Model Name: uBuds Inside FCC ID: 2AT9T-UBUDSINSIDE IC: 28620-UBUDSINSIDE 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 including interference that may cause undesired operation.

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version01 ShenzhenUlefoneTechnologyCo.,Ltd. DeclarationconcerningAntennaSpecification Itisherebydeclaredthattheproduct ModelNo.:uBudsInside FCCID:2AT9T-UBUDSINSIDE fulfillstherequirementinFCCtestrelatingtotheantennatype. ThedevicespecifiedaboveconfirmstotheFCCrecommendationsforinternalantennatype(s) describedbelow: ModelNo.ofantenna:N/A Typeofantenna: ChipAntenna Gainoftheantenna:1.5dBi Frequencyrange: 2400-2500 MHz Themountingoftheantennaisfixedtotheradiomoduleandnootherantennashouldbeused. Companyname:ShenzhenUlefoneTechnologyCo.,Ltd. Address:7A01,BuildingA,Block1,AnhongjiTianyaoPlaza,LonghuaDistrict, City:ShenzhenCity,GuangdongProvince ZIP/Postalcode: Country: China Place:ShenzhenCityDate:2022-08-09 Signature: [Name]ChenHongchi

FCC ID: 2AT9T-UBUDSINSIDE Portable device According to §15.247(e)(i) and §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to KDB447498 D01 General RF Exposure Guidance V06 The 1-g SAR and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)]·[√f(GHZ)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where: • f(GHZ) is the RF channel transmit frequency in GHz • Power and distance are rounded to the nearest mW and mm before calculation • The result is rounded to one decimal place for comparison When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. BT: Left Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculation SAR Exclusion threshold SAR test exclusion 2.402 -2.63 0.55-2±1-10.79<50.246223.00YES 2.441 -1.91 0.64-2±1-10.79<50.248213.00YES 2.480 -0.87 0.820±111.26<50.396513.00YES 2.402 -2.01 0.63-2±1-10.79<50.246223.00YES 2.441 -1.23 0.75-2±1-10.79<50.248213.00YES 2.480 -2.87 0.52-2±1-10.79<50.250183.00YES GFSK π/4- DQPSK BLE: Left Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculation SAR Exclusion threshold SAR test exclusion 2.402 -5.29 0.30-5±1-40.40<50.123403.00YES 2.440-5.72 0.27-5±1-40.40<50.124373.00YES 2.480-5.26 0.30-5±1-40.40<50.125393.00YES GFSK （1M） Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculation SAR Exclusion threshold SAR test exclusion 2.402-5.10.31-5±1-40.40<50.123403.00YES 2.440-5.710.27-5±1-40.40<50.124373.00YES 2.480-5.080.31-5±1-40.40<50.125393.00YES GFSK （2M） BT: Right Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculation SAR Exclusion threshold SAR test exclusion 2.402-2.820.52-2±1-10.79<50.246223.00YES 2.441-1.980.63-2±1-10.79<50.248213.00YES 2.480-0.90.810±111.26<50.396513.00YES 2.402-2.170.61-2±1-10.79<50.246223.00YES 2.441-1.270.75-2±1-10.79<50.248213.00YES 2.480-2.840.52-2±1-10.79<50.250183.00YES GFSK π/4- DQPSK BLE: Right Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculation SAR Exclusion threshold SAR test exclusion 2.402 -5.25 0.30-5±1-40.40<50.123403.00YES 2.440 -5.67 0.27-5±1-40.40<50.124373.00YES 2.480 -5.18 0.30-5±1-40.40<50.125393.00YES GFSK (1M) Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculation SAR Exclusion threshold SAR test exclusion 2.402 -5.22 0.30-5±1-40.40<50.123403.00YES 2.440 -5.7 0.27-5±1-40.40<50.124373.00YES 2.480 -5.04 0.31-5±1-40.40<50.125393.00YES GFSK (2M) Conclusion: For the max result : 0.39651 ≤ 3.0 for 1g SAR, No SAR is required. Signature: Date: 2022-08-12 NAME AND TITLE (Please print or type): Alex li /Manager COMPANY (Please print or type): Shenzhen NTEK Testing Technology Co., Ltd./ 1/F, Building E, Fenda Science Park, Sanwei Community, Xixiang Street Bao’an District, Shenzhen P.R. China.

Report No.: STR220707003001E Version.1.3 Page 1 of 113 RADIO TEST REPORT FCC ID: 2AT9T-UBUDSINSIDE Product: TRUE WIRELESS EARBUDS Trade Mark: ulefone Model No.: uBuds Inside Family Model: N/A Report No.: STR220707003001E Issue Date: Jul 15. 2022 Prepared for Shenzhen Ulefone Technology Co., Ltd. 7A01, Building A, Block 1, Anhongji Tianyao Plaza, Longhua District, Shenzhen City, Guangdong Province China Prepared by Shenzhen NTEK Testing Technology Co., Ltd. 1/F, Building E, Fenda Science Park, Sanwei Community, Xixiang Street Bao’an District, Shenzhen 518126 P.R. China Tel. 400-800-6106, 0755-2320 0050, 0755-2320 0090 Website: http://www.ntek.org.cn Report No.: STR220707003001E Version.1.3 Page 2 of 113 TABLE OF CONTENTS 1 TEST RESULT CERTIFICATION ...................................................................................................................... 3 2 SUMMARY OF TEST RESULT S ......................................................................................................................... 4 3 FACILITIES AND ACCREDITATIONS ............................................................................................................. 5 3.1 FACILITIES..................................................................................................................................................... 5 3.2 LABORATORY ACCREDITATIONS AND LISTINGS ................................................................................. 5 3.3 MEASUREMENT UNCERTAINTY ............................................................................................................... 5 4 GENERAL DESCRIPTION OF EUT .................................................................................................................. 6 5 DESCRIPTION OF TEST MODES ..................................................................................................................... 8 6 SETUP OF EQUIPMENT UNDER TEST ........................................................................................................... 9 6.1 BLOCK DIAGRAM CONFIGURATION OF TEST SYSTEM ....................................................................... 9 6.2 SUPPORT EQUIPMENT............................................................................................................................... 10 6.3 EQUIPMENTS LIST FOR ALL TEST ITEMS .............................................................................................. 11 7 TEST REQUIREMENTS .................................................................................................................................... 13 7.1 CONDUCTED EMISSIONS TEST ............................................................................................................... 13 7.2 RADIATED SPURIOUS EMISSION ............................................................................................................ 18 7.3 NUMBER OF HOPPING CHANNEL ........................................................................................................... 32 7.4 HOPPING CHANNEL SEPARATION MEASUREMENT ........................................................................... 33 7.5 AVERAGE TIME OF OCCUPANCY (DWELL TIME) ................................................................................ 34 7.6 20DB BANDWIDTH TEST .......................................................................................................................... 36 7.7 PEAK OUTPUT POWER .............................................................................................................................. 37 7.8 CONDUCTED BAND EDGE MEASUREMENT......................................................................................... 38 7.9 SPURIOUS RF CONDUCTED EMISSION .................................................................................................. 39 7.10 ANTENNA APPLICATION .......................................................................................................................... 40 7.11 FREQUENCY HOPPING SYSTEM (FHSS) EQUIPMENT REQUIREMENTS ......................................... 41 8 TEST RESULTS ................................................................................................................................................... 42 LEFT ............................................................................................................................................................................ 42 8.1 DWELL TIME ................................................................................................................................................... 42 8.2 MAXIMUM CONDUCTED OUTPUT POWER ....................................................................................................... 46 8.3 OCCUPIED CHANNEL BANDWIDTH .................................................................................................................. 50 8.4 CARRIER FREQUENCIES SE PA R AT I O N .............................................................................................................. 57 8.5 NUMBER OF HOPPING CHANNEL ..................................................................................................................... 61 8.6 BAND EDGE .................................................................................................................................................... 62 8.7 CONDUCTED RF SPURIOUS EMISSION ............................................................................................................. 71 RIGHT .......................................................................................................................................................................... 78 8.8 DWELL TIME ................................................................................................................................................... 78 8.9 MAXIMUM CONDUCTED OUTPUT POWER ....................................................................................…

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Report No.: STR220707003001E Version.1.3 Page 78 of 113 RIGHT 8.8 DWELL TIME Condition Mode Frequency (MHz) Pulse Time (ms) Total Dwell Time (ms) Period Time (ms) Limit (ms) Verdict NVNT 1-DH1 2441 0.375 120 31600 400 Pass NVNT 1-DH3 2441 1.638 262.08 31600 400 Pass NVNT 1-DH5 2441 2.88 307.2 31600 400 Pass NVNT 2-DH1 2441 0.39 124.8 31600 400 Pass NVNT 2-DH3 2441 1.644 263.04 31600 400 Pass NVNT 2-DH5 2441 2.88 307.2 31600 400 Pass Dwell NVNT 1-DH1 2441MHz Report No.: STR220707003001E Version.1.3 Page 79 of 113 Dwell NVNT 1-DH3 2441MHz Dwell NVNT 1-DH5 2441MHz Report No.: STR220707003001E Version.1.3 Page 80 of 113 Dwell NVNT 2-DH1 2441MHz Dwell NVNT 2-DH3 2441MHz Report No.: STR220707003001E Version.1.3 Page 81 of 113 Dwell NVNT 2-DH5 2441MHz Report No.: STR220707003001E Version.1.3 Page 82 of 113 8.9 MAXIMUM CONDUCTED OUTPUT POWER Condition Mode Frequency (MHz) Antenna Power (dBm) Limit (dBm) Verdict NVNT 1-DH5 2402 Ant 1 -2.82 30 Pass NVNT 1-DH5 2441 Ant 1 -1.98 30 Pass NVNT 1-DH5 2480 Ant 1 -0.90 30 Pass NVNT 2-DH5 2402 Ant 1 -2.17 21 Pass NVNT 2-DH5 2441 Ant 1 -1.27 21 Pass NVNT 2-DH5 2480 Ant 1 -2.84 21 Pass Power NVNT 1-DH5 2402MHz Ant1 Report No.: STR220707003001E Version.1.3 Page 83 of 113 Power NVNT 1-DH5 2441MHz Ant1 Power NVNT 1-DH5 2480MHz Ant1 Report No.: STR220707003001E Version.1.3 Page 84 of 113 Power NVNT 2-DH5 2402MHz Ant1 Power NVNT 2-DH5 2441MHz Ant1 Report No.: STR220707003001E Version.1.3 Page 85 of 113 Power NVNT 2-DH5 2480MHz Ant1 Report No.: STR220707003001E Version.1.3 Page 86 of 113 8.10 OCCUPIED CHANNEL BANDWIDTH Condition Mode Frequency (MHz) Antenna 99% OBW (MHz) -20 dB Bandwidth (MHz) Verdict NVNT 1-DH5 2402 Ant 1 0.8651 0.946 Pass NVNT 1-DH5 2441 Ant 1 0.8312 0.94 Pass NVNT 1-DH5 2480 Ant 1 0.8871 0.934 Pass NVNT 2-DH5 2402 Ant 1 1.1688 1.282 Pass NVNT 2-DH5 2441 Ant 1 1.1688 1.28 Pass NVNT 2-DH5 2480 Ant 1 1.1688 1.28 Pass OBW NVNT 1-DH5 2402MHz Ant1 Report No.: STR220707003001E Version.1.3 Page 87 of 113 -20 dB BW NVNT 1-DH5 2402MHz Ant1 OBW NVNT 1-DH5 2441MHz Ant1 Report No.: STR220707003001E Version.1.3 Page 88 of 113 -20 dB BW NVNT 1-DH5 2441MHz Ant1 OBW NVNT 1-DH5 2480MHz Ant1 Report No.: STR220707003001E Version.1.3 Page 89 of 113 -20 dB BW NVNT 1-DH5 2480MHz Ant1 OBW NVNT 2-DH5 2402MHz Ant1 Report No.: STR220707003001E Version.1.3 Page 90 of 113 -20 dB BW NVNT 2-DH5 2402MHz Ant1 OBW NVNT 2-DH5 2441MHz Ant1 Report No.: STR220707003001E Version.1.3 Page 91 of 113 -20 dB BW NVNT 2-DH5 2441MHz Ant1 OBW NVNT 2-DH5 2480MHz Ant1 Report No.: STR220707003001E Version.1.3 Page 92 of 113 -20 dB BW NVNT 2-DH5 2480MHz Ant1 Report No.: STR220707003001E Version.1.3 Page 93 of 113 8.11 CARRIER FREQUENCIES SEPARATION Condition Mode Hopping Freq1 (MHz) Hopping Freq2 (MHz) HFS (MHz) Limit (MHz) Verdict NVNT 1-DH5 2401.99 2402.992 1.002 0.946 Pass NVNT 1-DH5 2440.99 2441.995 1.005 0.94 Pass NVNT 1-DH5 2478.996 2480.001 1.005 0.934 Pass NVNT 2-DH5 2401.84 2402.839 0.999 0.855 Pass NVNT 2-DH5 2440.993 2441.998 1.005 0.853 Pass NVNT 2-DH5 2479.002 2479.995 0.993 0.853 Pass CFS NVNT 1-DH5 2402MHz Report No.: STR220707003001E Version.1.3 Page 94 of 113 CFS NVNT 1-DH5 2441MHz CFS NVNT 1-DH5 2480MHz Report No.: STR220707003001E Version.1.3 Page 95 of 113 CFS NVNT 2-DH5 2402MHz CFS NVNT 2-DH5 2441MHz Report No.: STR220707003001E Version.1.3 Page 96 of 113 CFS NVNT 2-DH5 2480MHz Report No.: STR220707003001E Version.1.3 Page 97 of 113 8.12 NUMBER OF HOPPING CHANNEL Condition Mode Hopping Number Limit Verdict NVNT 1-DH5 79 15 Pass NVNT 2-DH5 79 15 Pass Hopping No. NVNT 1-DH5 2402MHz Hopping No. NVNT 2-DH5 2402MHz Report No.: STR220707003001E Version.1.3 Page 98 of 113 8.13 BAND EDGE Condition Mode Frequency (MHz) Antenna Hopping Mode Max Value (dBc) Limit (dBc) Verdict NVNT 1-DH5 2402 Ant 1 No-Hopping -37.6 -20 Pass NVNT 1-DH5 2402 Ant 1 Hopping -36.99 -20 Pass NVNT 1-DH5 2480 Ant 1 No-Hopping -40.73 -20 Pass NVNT 1-DH5 2480 Ant 1 Hopping -40.77 -20 Pass NVNT 2-DH5 2402 Ant 1 No-Hopping -37.1 -20 Pass NVNT 2-DH5 2402 Ant 1 Hopping -37.38 -20 Pass NVNT 2-DH5 2480 Ant 1 No-Hopping -37.9 -20 Pass NVNT 2-DH5 2480 Ant 1 Hopping -38.09 -20 Pass Band Edge NVNT 1-DH5 2402MHz Ant1 No-Hopping Ref Report No.: STR220707003001E Version.1.3 Page 99 of 113 Band Edge NVNT 1-DH5 2402MHz Ant1 No-Hopping Emission Band Edge(Hopping) NVNT 1-DH5 2402MHz Ant1 Hopping Ref Report No.: STR220707003001E Version.1.3 Page 100 of 113 Band Edge(Hopping) NVNT 1-DH5 2402MHz Ant1 Hopping Emission Band Edge NVNT 1-DH5 2480MHz Ant1 No-Hopping Ref Report No.: STR220707003001E Version.1.3 Page 101 of 113 Band Edge NVNT 1-DH5 2480MHz Ant1 No-Hopping Emission Band Edge(Hopping) NVNT 1-DH5 2480MHz Ant1 Hopping Ref Report No.: STR220707003001E Version.1.3 Page 102 of 113 Band Edge(Hopping) NVNT 1-DH5 2480MHz Ant1 Hopping Emission Band Edge NVNT 2-DH5 2402MHz Ant1 No-Hopping Ref Report No.: STR220707003001E Version.1.3 Page 103 of 113 Band Edge NVNT 2-DH5 2402MHz Ant1 No-Hopping Emission Band Edge(Hopping) NVNT 2-DH5 2402MHz Ant1 Hopping Ref Report No.: STR220707003001E Version.1.3 Page 104 of 113 Band Edge(Hopping) NVNT 2-DH5 2402MHz Ant1 Hopping Emission Band Edge NVNT 2-DH5 2480MHz Ant1 No-Hopping Ref Report No.: STR220707003001E Version.1.3 Page 105 of 113 Band Edge NVNT 2-DH5 2480MHz Ant1 No-Hopping Emission Band Edge(Hopping) NVNT 2-DH5 2480MHz Ant1 Hopping Ref Report No.: STR220707003001E Version.1.3 Page 106 of 113 Band Edge(Hopping) NVNT 2-DH5 2480MHz Ant1 Hopping Emission Report No.: STR220707003001E Version.1.3 Page 107 of 113 8.14 CONDUCTED RF SPURIOUS EMISSION Condition Mode Frequency (MHz) Antenna Max Value (dBc) Limit (dBc) Verdict NVNT 1-DH5 2402 Ant 1 -51.44 -20 Pass NVNT 1-DH5 2441 Ant 1 -52.64 -20 Pass NVNT 1-DH5 2480 Ant 1 -54.35 -20 Pass NVNT 2-DH5 2402 Ant 1 -50.26 -20 Pass NVNT 2-DH5 2441 Ant 1 -49.57 -20 Pass NVNT 2-DH5 2480 Ant 1 -41.21 -20 Pass Tx. Spurious NVNT 1-DH5 2402MHz Ant1 Ref Report No.: STR220707003001E Version.1.3 Page 108 of 113 Tx. Spurious NVNT 1-DH5 2402MHz Ant1 Emission Tx. Spu…

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Radiated Measurement Photos Conducted Measurement Photos