2ACIX-PI8EBIn-ear True Wireless Earbuds

Applicant Declaration QSF27-14-04 Rev 1.1 Jan 17, 2024 Page 1 of 2 Original Issue: Jan. 4, 2021 SGS North America Inc. 620 Old Peachtree Road SUITE 100 Suwanee, Georgia 30024 United States Applicant Legal Business Name B&W Group Ltd. Address Dale Road Worthing West Sussex BN11 2BH, United Kingdom FRN 0023565765 Grantee Code 2ACIX FCC ID 2ACIX-PI8EB Authorized Contact Name Pat Sullivan Contact Email [email protected] Contact Phone 441903221722 I, the undersigned, certify that I am an authorized signatory for the Applicant and therefore declare; a) in accordance with 47CFR2.911(d), all of the statements herein and the exhibits attached hereto are true and correct to the best of my knowledge and belief. b) in accepting a Grant of Equipment Authorization issued by a TCB, under the authority of the FCC, as a result of the representations made in this application, the Applicant is responsible for: (1) labeling the equipment with the exact FCC ID as specified in this application, (2) compliance statement labeling pursuant to the applicable rules, (3) compliance of the equipment with the applicable technical rules, c) if the Applicant is not the actual manufacturer of the equipment, appropriate arrangements have been made with the manufacturer to ensure that production units of this equipment will continue to comply with the FCC’s technical requirements. d) in accordance with 47 CFR 2.909 and KDB394321, the Applicant has read, understood and agrees to accept that they are the responsible party and agree to abide by their responsibilities as specified under 47 CFR 2.909 and KDB394321. e) in accordance with ISO 17065, FCC KDB641163, FCC KDB610077, KDB394321 and RSP-100, the Applicant has read, understood, accepts and agrees to abide by the post market surveillance requirements. (1) the Applicant understands, accepts and agrees that a sample may be requested for surveillance testing. (2) the Applicant shall make provisions to always have a production sample available upon request by SGS, FCC and/or ISED. (3) the Applicant shall, upon request by SGS, at the Applicant’s expense, provide a production sample of the requested product to SGS, FCC and/or ISED as instructed. The sample shall include all support devices, cables, software, accessories or other hardware or software required for evaluation, review, certification and audit surveillance of products certified by SGS. f) neither the Applicant nor any party to the application is subject to a denial of Federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. §862 because of a conviction for possession or distribution of a controlled substance. See 47CFR 1.2002(b) for the definition of a “party” for these purposes. g) the Applicant has read, understood, accepts and agrees to abide by the SGS North America, Inc.(TCB) terms and conditions. Link to CFRs: https://www.fcc.gov/wireless/bureau-divisions/technologies-systems-and-innovation-division/rules-regulations-title-47 Link to KDBs: https://apps.fcc.gov/oetcf/kdb/index.cfm Link to RSP-100: https://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01130.html Link to the Covered List: Covered List [ B&W Group Ltd.] (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. [ B&W Group Ltd. ] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant [is not] identified on the Covered list, established pursuant to §1.50002, as an entity producing “covered” equipment. Applicant Signature: Date:2024-03-13 Print Name: Pat Sullivan Title: Director of HW Quality Assurance *NOTE: This declaration cannot be signed by an Agent, it shall be signed by an authorized person listed in the FCC database Applicant Declaration QSF27-14-04 Rev 1.1 Jan 17, 2024 Page 2 of 2 Original Issue: Jan. 4, 2021 SGS North America Inc. 620 Old Peachtree Road SUITE 100 Suwanee, Georgia 30024 United States

B&W Group Ltd. Date: 02/28/2024 TO: Federal Communication Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 Regarding: FCC ID: 2ACIX-PI8EB To whom it may concern: We, the undersigned, hereby authorize SGS-CSTC Standards Technical Services Co., Ltd. (SGS) to act on our behalf in all manners relating to application for equipment authorization with respect to the FCC ID above, including signing of all documents relating to these matters. Any and all acts carried out by the agent on our behalf shall have the same effect as acts of our own. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). Where our agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for Certification, as specified by SGS North America, Inc., still resides with B&W Group Ltd. This authorization is valid until further written notice from the applicant. Print Name: Pat Sullivan Title: Director of HW Quality Assurance Signature: On behalf of Company: B&W Group Ltd. Telephone: 441903221722 E-mail: [email protected]

B&W Group Ltd. Date: 02/28/2024 TO: Federal Communication Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 From: Regarding: Confidentiality Request regarding application for FCC ID: 2ACIX-PI8EB LONG TERM CONFIDENTIALITY Pursuant to 47 CFR Section 0.459 and 0.457 of the commission’s rules, the applicant hereby requests confidential treatment of the documents listed below, associated with the certification application referenced above. Schematic(s) Block Diagrams Operational Descriptions Tune up procedure The documents above contain proprietary information not released to the public. Public disclosure of this information may prove harmful to the business of the applicant. SHORT TERM CONFIDENTIALITY Additionally, the applicant requests the following documents be held confidential until the device is marketed or 180 days from the grant date, whichever is less. If the device is marketed within 180 days of the Grant Date, the applicant will notify the TCB per FCC KDB 726920 D01 Confidentiality Request Procedures. Delete any document that is NOT included in your application External Photos Internal Photos Test Setup Photos User manual(s) Print Name: Pat Sullivan Title: Director of HW Quality Assurance Signature: On behalf of Company: B&W Group Ltd. Telephone: 441903221722 E-mail: [email protected]

Label placement To Federal Communication Commission Equipment Authorization Branch 7 435 Oakland Mills Road Columbia, MID 21046 For the following product, Model Number: FCC ID: 2ACIX-PI8EB The FCC ID is not affixed on the product itself, but described in the product user manual and the product package/case due to below reasons. Reasons： The product is too small to put the label on it. The Size is below: 24.34 mm* 20.4 mm* 26.15 mm Print Name: Pat Sullivan Title: Director of HW Quality Assurance Signature: On behalf of Company: B&W Group Ltd. Telephone: 441903221722 E-mail: [email protected]

SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZSAR-TRF-01 Rev. A/0 May15,2023 Report No.: SZCR240200051506 Page: 1 of 37 Keny Xu EMC Laboratory Manager SAR TEST REPORT Application No.: SZCR2402000515AT Applicant: B&W Group Ltd. Address of Applicant: Dale Road Worthing BN11 2BH United Kingdom Manufacturer: B&W Group Ltd. Address of Manufacturer: Dale Road Worthing BN11 2BH United Kingdom Factory: Merry Electronics (Shenzhen) Co., Ltd. The Second Longhua Branch Address of Factory: Floor1~5, Building A&B, Merry Industrial Park, Huarong Road, Dalang Street, Longhua New District, 518109 Shenzhen City, Guangdong Province, PEOPLE'S REPUBLIC OF CHINA Product Name: In-ear True Wireless Earbuds Model No.(EUT): Pi8 Trade mark: Bowers & Wilkins FCC ID: 2ACIX-PI8EB Standard(s) : FCC 47CFR §2.1093 Date of Receipt: 2024-02-29 Date of Test: 2024-02-29 Date of Issue: 2024-03-05 Test Result: Pass* * In the configuration tested, the EUT complied with the standards specified above. SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZSAR-TRF-01 Rev. A/0 May15,2023 Report No.: SZCR240200051506 Page: 2 of 37 Revision Record Version Description Date Remark 00 Original 2024-03-05 / Authorized for issue by: Roman Pan/ Project Engineer Eric Fu / Reviewer SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZSAR-TRF-01 Rev. A/0 May15,2023 Report No.: SZCR240200051506 Page: 3 of 37 TEST SUMMARY Test Summary Frequency Band Max Reported SAR1g(W/kg) Head BT 0.39 SAR Limited(W/kg) 1.6 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZSAR-TRF-01 Rev. A/0 May15,2023 Report No.: SZCR240200051506 Page: 4 of 37 CONTENTS 1 GENERAL INFORMATION......................................................................................................................... 6 1.1 GENERAL DESCRIPTION OF EUT ............................................................................................................ 6 1.2 DUT ANTENNA LOCATIONS .................................................................................................................... 7 1.3 TEST SPECIFICATION............................................................................................................................. 8 1.4 RF EXPOSURE LIMITS ............................................................................................................................ 9 1.5 TEST LOCATION ...................................................................................................................................10 1.6 TEST FACILITY .....................................................................................................................................10 2 LABORATORY ENVIRONMENT ...............................................................................................................11 3 SAR MEASUREMENTS SYSTEM CONFIGURATION ...............................................................................12 3.1 THE SAR MEASUREMENT SYSTEM ........................................................................................................12 3.2 ISOTROPIC E-FIELD PROBE EX3DV4 .....................................................................................................14 3.3 DATA ACQUISITION ELECTRONICS (DAE) ...............................................................................................15 3.4 SAM TWIN PHANTOM ...........................................................................................................................15 3.5 ELI PHANTOM .....................................................................................................................................16 3.6 DEVICE HOLDER FOR TRANSMITTERS.....................................................................................................17 3.7 MEASUREMENT PROCEDURE .................................................................................................................18 3.7.1 Scanning procedure ......................................................................................................................18 3.7.2 Data Storage .................................................................................................................................20 3.7.3 Data Evaluation by SEMCAD ........................................................................................................20 4 SAR MEASUREMENT VARIABILITY AND UNCERTAINTY .....................................................................22 4.1 SAR MEASUREMENT VARIABILITY...........................................................................................................22 4.2 SAR MEASUREMENT UNCERTAINTY ........................................................................................................23 5 DESCRIPTION OF TEST POSITION .........................................................................................................24 5.1 THE TEST POSITION .............................................................................................................................24 6 SAR SYSTEM VERIFICATION PROCEDURE ...........................................................................................25 6.1 TISSUE SIMULATE LIQUID ......................................................................................................................25 6.1.1 Recipes for Tissue Simulate Liquid ................................................................................................25 6.1.2 Test Liquids Confirmation ..............................................................................................................26 6.1.3 Measurement for Tissue Simulate Liquid .......................................................................................27 6.2 SAR SYSTEM CHECK ...........................................................................................................................28 6.2.1 Justification for Extended SAR Dipole Calibrations ............…

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1. Antenna Description: Antenna type LDS Model BHC367 Frequency range 2400-2500MHz Manufacturer Shenzhen Cicent Communication Technology Co., Ltd. Laboratory Shenzhen Cicent Communication Technology Co., Ltd. Address 505-506 ,ABlock,Donglian Building,Chuangye 2 road,Baoan District,Shenzhen,Guangdong,P.R china ANT Peak Gain L= -10.04dBi R= -10.66dBi Antenna Description Omnidirectional Antenna 2. Antenna Photo: 3. Test Equipment & Conditions 3.1 Test instrument VSWR is tested using Agilent E5071C connected to a hand mechanism, and the status is free space. 3.2 Test environment and methods SCDMA test equipment: CMW500 LTE-TDD/FDD-SCDMA test equipment: CMW500 WCDMA/GSM/CDMA test equipment: CMW500 Passive efficiency testing equipment: Agilent E5071C 4. Antenna gain R Frequency （MHz） Gain (dBi) Efficiency (dB ) Efficiency 2400 -11.35 -12.95 5.06 2410 -11.41 -12.93 5.09 2420 -11.36 -12.84 5.20 2430 -11.39 -12.85 5.19 2440 -11.47 -12.88 5.15 2450 -11.27 -12.82 5.22 2460 -11.34 -12.84 5.20 2470 -10.87 -12.62 5.47 2480 -10.66 -12.51 5.61 2490 -10.98 -12.66 5.43 2500 -11.02 -12.68 5.40 L Frequency （MHz） Gain (dBi) Efficiency (dB ) Efficiency 2400 -10.81 -13.73 4.24 2410 -10.70 -13.53 4.43 2420 -10.54 -13.34 4.64 2430 -10.35 -13.12 4.87 2440 -10.42 -13.05 4.95 2450 -10.22 -12.87 5.17 2460 -10.04 -12.73 5.33 2470 -10.31 -12.79 5.26 2480 -10.08 -12.59 5.51 2490 -9.63 -12.40 5.76 2500 -9.84 -12.63 5.45 5．Antenna Radiation Pattern L (unit:dBi) (unit:dBi) (unit:dBi) 2400MHz Theta=90°(dBi) Phi=90°(dBi) Phi=0°(dBi) 2450MHz Theta=90°(dBi) Phi=90°(dBi) Phi=0°(dBi) 2500MHz Theta=90°(dBi) Phi=90°(dBi) Phi=0°(dBi) R (unit:dBi) (unit:dBi) (unit:dBi) 2400MHz Theta=90°(dBi) Phi=90°(dBi) Phi=0°(dBi) 2450MHz Theta=90°(dBi) Phi=90°(dBi) Phi=0°(dBi) 2500MHz Theta=90°(dBi) Phi=90°(dBi) Phi=0°(dBi)

SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/1 Report No.: SZCR240200051504 Page: 1 of 132 Keny Xu EMC Laboratory Manager TEST REPORT Application No.: SZCR2402000515AT Applicant: B&W Group Ltd. Address of Applicant: Dale Road Worthing BN11 2BH United Kingdom Manufacturer: B&W Group Ltd. Address of Manufacturer: Dale Road Worthing BN11 2BH United Kingdom Factory: Merry Electronics (Shenzhen) Co., Ltd. The Second Longhua Branch Address of Factory: Floor1~5, Building A&B, Merry Industrial Park, Huarong Road, Dalang Street, Longhua New District, 518109 Shenzhen City, Guangdong Province, PEOPLE'S REPUBLIC OF CHINA Equipment Under Test (EUT): EUT Name: In-ear True Wireless Earbuds Model No.: Pi8 Trade Mark: Bowers & Wilkins FCC ID: 2ACIX-PI8EB Standard(s) : 47 CFR Part 15, Subpart C 15.247 Date of Receipt: 2024-02-07 Date of Test: 2024-02-20 to 2024-03-04 Date of Issue: 2024-02-28 Test Result: Pass* * In the configuration tested, the EUT complied with the standards specified above. SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/1 Report No.: SZCR240200051504 Page: 2 of 132 Revision Record Version Chapter Date Modifier Remark 01 2024-02-28 Original Authorized for issue by: Bill Chen/Project Engineer Eric Fu/Reviewer SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/1 Report No.: SZCR240200051504 Page: 3 of 132 2 Test Summary Radio Spectrum Technical Requirement Item Standard Method Requirement Result Antenna Requirement 47 CFR Part 15, Subpart C 15.247 N/A 47 CFR Part 15, Subpart C 15.203 & 15.247(b)(4) Pass Radio Spectrum Matter Part Item Standard Method Requirement Result Conducted Peak Output Power 47 CFR Part 15, Subpart C 15.247 ANSI C63.10 (2013) Section 11.9.1 47 CFR Part 15, Subpart C 15.247(b)(1) Pass Minimum 6dB Bandwidth ANSI C63.10 (2013) Section 11.8.1 47 CFR Part 15, Subpart C 15.247a(2) Pass Power Spectrum Density ANSI C63.10 (2013) Section 11.10.2 47 CFR Part 15, Subpart C 15.247(e) Pass Conducted Band Edges Measurement ANSI C63.10 (2013) Section 11.13.3.2 47 CFR Part 15, Subpart C 15.247(d) Pass Conducted Spurious Emissions ANSI C63.10 (2013) Section 11.11 47 CFR Part 15, Subpart C 15.247(d) Pass Radiated Emissions which fall in the restricted bands ANSI C63.10 (2013) Section 6.10.5 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass Radiated Spurious Emissions Below 1GHz ANSI C63.10 (2013) Section 6.4,6.5 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass Radiated Spurious Emissions Above 1GHz ANSI C63.10 (2013) Section 6.6 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/1 Report No.: SZCR240200051504 Page: 4 of 132 3 Contents Page 1 Cover Page ................................................................................................................................................ 1 2 Test Summary ........................................................................................................................................... 3 3 Contents .................................................................................................................................................... 4 4 General Information .................................................................................................................................. 6 4.1 Details of E.U.T. ................................................................................................................................. 6 4.2 Description of Support Units .............................................................................................................. 6 4.3 Measurement Uncertainty .................................................................................................................. 7 4.4 Test Location ...................................................................................................................................... 8 4.5 Test Facility ........................................................................................................................................ 8 4.6 Deviation from Standards ................................................................................................................... 8 4.7 Abnormalities from Standard Conditions ........................................................................................... 8 5 Equipment List .......................................................................................................................................... 9 6 Radio Spectrum Technical Requirement ............................................................................................. 12 6.1 Antenna Requirement ...................................................................................................................... 12 6.1.1 Test Requirement: ....................................................................................................................... 12 6.1.2 Conclusion ................................................................................................................................... 12 7 Radio Spectrum Matter Test Results .................................................................................................... 13 7.1 Conducted Peak Output Power........................................................................................................ 13 7.1.1 E.U.T. Operation .......................................................................................................................... 13 7.1.2 Test Mode Description ................................................................................................................. 13 7.1.3 Test Setup Diagram ..................................................................................................................... 14 7.1.4 Measurement Procedure and Data.........................................................…

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SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/1 Report No.: SZCR240200051504 Page: 122 of 132 2M_MCH_2440MHz_Ant1_NTNV 2M_HCH_2480MHz_Ant1_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/1 Report No.: SZCR240200051504 Page: 123 of 132 5. Unwanted Emissions In Non-restricted Frequency Bands 5.1 Ref 5.1.1 Test Result Mode TX Type Frequency (MHz) ANT Level of Reference (dBm) 1M SISO 2402 1 7.50 2440 1 7.30 2480 1 7.14 2M SISO 2402 1 7.47 2440 1 7.32 2480 1 7.16 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/1 Report No.: SZCR240200051504 Page: 124 of 132 5.1.2 Test Graph 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/1 Report No.: SZCR240200051504 Page: 125 of 132 1M_HCH_2480MHz_Ant1_NTNV 2M_LCH_2402MHz_Ant1_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/1 Report No.: SZCR240200051504 Page: 126 of 132 2M_MCH_2440MHz_Ant1_NTNV 2M_HCH_2480MHz_Ant1_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/1 Report No.: SZCR240200051504 Page: 127 of 132 5.2 CSE 5.2.1 Test Result Mode TX Type Frequency (MHz) ANT Level of Reference (dBm) Limit (dBm) Verdict 1M SISO 2402 1 7.50 -12.50 Pass 2440 1 7.50 -12.50 Pass 2480 1 7.50 -12.50 Pass 2M SISO 2402 1 7.47 -12.53 Pass 2440 1 7.47 -12.53 Pass 2480 1 7.47 -12.53 Pass SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/1 Report No.: SZCR240200051504 Page: 128 of 132 5.2.2 Test Graph 1M_LCH_2402MHz_Ant1_NTNV 1M_LCH_2402MHz_Ant1_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/1 Report No.: SZCR240200051504 Page: 129 of 132 1M_MCH_2440MHz_Ant1_NTNV 1M_HCH_2480MHz_Ant1_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/1 Report No.: SZCR240200051504 Page: 130 of 132 1M_HCH_2480MHz_Ant1_NTNV 2M_LCH_2402MHz_Ant1_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/1 Report No.: SZCR240200051504 Page: 131 of 132 2M_LCH_2402MHz_Ant1_NTNV 2M_MCH_2440MHz_Ant1_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/1 Report No.: SZCR240200051504 Page: 132 of 132 2M_HCH_2480MHz_Ant1_NTNV 2M_HCH_2480MHz_Ant1_NTNV - End of the Report -

Report No.: SZCR240200051506 Appendix A Detailed System Check Results 1. System Performance Check System Performance Check 2450 MHz Head Date: 2024/2/29 Test Laboratory: SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch System Performance Check 2450MHz Head DUT: D2450V2; Type: Dipole; Serial: 733 Communication System: CW; Frequency: 2450 MHz;Duty Cycle: 1:1 Medium: HSL2450;Medium parameters used: f = 2450 MHz; σ = 1.817 S/m; ε r = 39.77; ρ = 1000 kg/m 3 Phantom section: Flat Section DASY 5 Configuration: Probe: EX3DV4 - SN3836; ConvF(7.3, 7.3, 7.3); Calibrated: 2023/8/7; Sensor-Surface: 1.4mm (Mechanical Surface Detection) Electronics: DAE4 Sn1267; Calibrated: 2024/1/3 Phantom: SAM5; Type: SAM Twin; Serial: 1673 DASY52 52.10.4(1527); SEMCAD X 14.6.14(7483) Configuration/d=10mm, Pin=250mW/Area Scan (5x8x1): Measurement grid: dx=12mm, dy=12mm Maximum value of SAR (measured) = 20.6 W/kg Configuration/d=10mm, Pin=250mW/Zoom Scan (5x5x7)/Cube 0: Measurement grid: dx=5mm, dy=5mm, dz=5mm Reference Value = 90.469 V/m; Power Drift = 0.16 dB Peak SAR (extrapolated) = 28.4 W/kg SAR(1 g) = 13.4 W/kg; SAR(10 g) = 6.21 W/kg Maximum value of SAR (measured) = 23.0 W/kg 0 dB = 23.0 W/kg = 13.62 dBW/kg

Report No.: SZCR240200051506 Appendix B Detailed Test Results BT for Head Date: 2024/2/29 Test Laboratory: SGS-SAR Lab Pi8 Right earbud Bluetooth DH5 0CH Left side 0mm Ant1 DUT: Pi8; Type: In-ear True Wireless Earbuds Communication System: UID 0, Bluetooth (0); Frequency: 2402 MHz;Duty Cycle: 1:1 Medium: HSL2450;Medium parameters used: f = 2402 MHz; σ = 1.715 S/m; ε r = 40.819; ρ = 1000 kg/m 3 Phantom section: Flat Section DASY 5 Configuration: Probe: EX3DV4 - SN3836; ConvF(7.3, 7.3, 7.3); Calibrated: 2023/8/7 Sensor-Surface: 1.4mm (Mechanical Surface Detection) Electronics: DAE4 Sn1267; Calibrated: 2024/1/3 Phantom: SAM5; Type: SAM Twin; Serial: 1673 DASY52 52.10.4(1527); SEMCAD X 14.6.14(7483) Configuration/Head/Area Scan (6x6x1): Measurement grid: dx=12mm, dy=12mm Maximum value of SAR (measured) = 0.598 W/kg Configuration/Head/Zoom Scan (7x7x7)/Cube 0: Measurement grid: dx=5mm, dy=5mm, dz=5mm Reference Value = 11.47 V/m; Power Drift = -0.01 dB Peak SAR (extrapolated) = 1.20 W/kg SAR(1 g) = 0.204 W/kg; SAR(10 g) = 0.078 W/kg Maximum value of SAR (measured) = 0.676 W/kg 0 dB = 0.676 W/kg = -1.70 dBW/kg Date: 2024/2/29 Test Laboratory: SGS-SAR Lab Pi8 Left earbud Bluetooth DH5 0CH Right side 0mm Ant1 DUT: Pi8; Type: In-ear True Wireless Earbuds Communication System: UID 0, Bluetooth (0); Frequency: 2402 MHz;Duty Cycle: 1:1 Medium: HSL2450;Medium parameters used: f = 2402 MHz; σ = 1.715 S/m; ε r = 40.819; ρ = 1000 kg/m 3 Phantom section: Flat Section DASY 5 Configuration: Probe: EX3DV4 - SN3836; ConvF(7.3, 7.3, 7.3); Calibrated: 2023/8/7 Sensor-Surface: 1.4mm (Mechanical Surface Detection) Electronics: DAE4 Sn1267; Calibrated: 2024/1/3 Phantom: SAM5; Type: SAM Twin; Serial: 1673 DASY52 52.10.4(1527); SEMCAD X 14.6.14(7483) Configuration/Head/Area Scan (6x6x1): Measurement grid: dx=12mm, dy=12mm Maximum value of SAR (measured) = 0.572 W/kg Configuration/Head/Zoom Scan (7x7x7)/Cube 0: Measurement grid: dx=5mm, dy=5mm, dz=5mm Reference Value = 10.37 V/m; Power Drift = 0.05 dB Peak SAR (extrapolated) = 1.59 W/kg SAR(1 g) = 0.275 W/kg; SAR(10 g) = 0.088 W/kg Maximum value of SAR (measured) = 0.923 W/kg 0 dB = 0.923 W/kg = -0.35 dBW/kg

Report No.: SZCR240200051506 Appendix C Calibration certificate 1. Dipole D2450V2-SN 733 2. DAE DAE4-SN 1267 3. Probe EX3DV4-SN 3836