2BAGA010021Charging Case

Drowsy Digital Inc Federal Communications Commissions Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 RE: CFR 47 §2.911 (d)(5) Attestation FCC ID: 2BAGA010021 Grantee FRN: 0033471475 Date: 4/9/2026 1. Drowsy Digital Inc 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. 2. Drowsy Digital Inc ("the applicant") certifies that, the device does not have cybersecurity and/ or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, identified on the Covered List installed on the device, nor will it be installed by the applicant anytime after certification. 3. Drowsy Digital Inc ("the applicant") certifies that the RF device is not a router "produced in a foreign country". 4. Drowsy Digital Inc certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing "covered" equipment and is not an affiliate or subsidiary of an entity identified on the Covered List. Sincerely yours, �. Name: Gabriela Arizan Job Title: Head of Program Management Company Name: Drowsy Digital Inc

Drowsy Digital Inc Federal Communications Commissions Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 RE: CFR 47 §2.911 (d)(7) Agent Designation Attestation FCC ID: 2BAGA010021 Grantee FRN: 0033471475 To whom it may concern: Date: 4/9/2026 Drowsy Digital Inc ("the applicant") as required by section §2 . 911 (d)(7), will also serve as the agent for service of process for the above referenced FCC ID. The applicant acknowledges that they will maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. The applicant further acknowledges their responsibility under CFR 47 §2.929(c) to inform the FCC whenever the agent information changes. Contact Person Gabriela Arizan Company Name Drowsy Digital Inc FCC FRN: 0033471475 Company US Address 850 New Burton Road Suite 201 Dover, DE 19904 United States Email [email protected] Sincerely yoyrs,- , / I // /4/,' , / ' 1 {. .,-// (IL,,,_ .. .. -· .. . - . - . - • • --, Name: Gabriela Arizan Job Title: Head of Program Management Company Name: Drowsy Digital Inc

Drowsy Digital Inc Date: 4/9/2026 Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 To whom it may concern: I , the undersigned, hereby authorize UL Verification Services Inc. to act on our behalf in all manners relating to application for equipment authorization, including signing of all documents r elating to these matters. Any and all acts carried out by UL Verification Services Inc. on our beh alf shall have t he same effect as acts of our own. I , the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, p ursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). In authorizing UL Verification Services Inc . as our representative, we still recognize that we are responsible to: a) comply with the relevant provisions of the certification program; b) make all necessary arrangements for the conduct of the evaluation, including provision for examining documentation and access to all areas, records (including internal audit reports) and personnel for the purposes of evaluation ( e.g. testing, inspection, assessment, surveillance, reassessment) and resolution of complaints; c) make claims regarding certification only in respect of the scope for which certification has been granted; d) do not use our product certification in such a manner as to bring the Certification Division into disrepute and not make any statement regarding our product certification which the Certification Division may consider misleading or unauthorized; e) upon suspension or cancellation of certification, discontinue use of all advertising matter that contains any reference thereto and return any certification documents as required by the Certification Division; f ) use certification only to indicate the products are certi,fied as being in conformity with specified standards;

Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 Subject: Request for Confidentiality FCC ID: 2BAGA010021 To Whom It May Concern: Drowsy Digital Inc Pursuant to the provisions of Sections 0.457 and 0.459 of the Commission's rules (47 CPR§§ 0.457, 0.459), we are requesting the Commission to withhold the following attachments as confidential document from public disclosure indefinitely. Schematic Diagram Block Diagram Theory of Operation Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Best Regards �- --------- Name: Gabriela Arizan Job Title: Head of Program Management Company Name: Drowsy Digital Inc Date: 4/9/2026

Drowsy Digital Inc DATE: 04/09/2026 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Request for Short-Term Confidentiality Company name: Drowsy Digital Inc FCC ID: 2BAGA010021 FCC Part 15 Certification Pursuant to Sections 0.457 and 0.459 of the commission rules, and in accordance with the FCC Public notice dated June 15, 2004 (DA 04-1705), we hereby request short-term confidentiality for the following items prior to marketing the device.: (1) Test Setup Photos (2) External Photos (3) Internal Photos (4) User Manual The applicant requests the exhibits selected above as short term confidential be withheld from public view for a period of 180 days from the date of the Grant of Equipment Authorization and prior to marketing. This is to avoid premature release of sensitive information prior to marketing or release of the product to the public. Sincerely, ��-�-- ·-- --- Signature Name: Gabriela Arizan Job Title: Head of Program Management Company Name: Drowsy Digital Inc

GRAPHICS, LID INTERIOR OZLO SLEEPBUDS® GEN 2, WORLDWIDE 01 FIGURE 1.0 RATIO 2:1 LID INTERIOR March 2, 2026 DROWSY DIGITAL, INC PROPRIETARY RIGHTS ARE INCLUDED HEREIN. THIS INFORMATION MAY NOT BE COPIED, TRANSFERRED OR DISCLOSED EXCEPT AS AUTHORIZED 1030083 NAA 3/2/2026 E536646 AUDIO EQUIPMENT D E S I G N E D B Y D R O W S Y D I G I T A L , I N C . d b a O Z L O S L E E P , M A R L B O R O U G H , M A U S A 0 1 7 5 2 W W W . O Z L O S L E E P . C O M / P A T E N T S O Z L O S L E E P B U D S ® 2 W I T H C H A R G E C A S E 1 I C P 5 / 2 1 / 3 0 C A P A C I T Y : 3 5 0 m A h I N P U T : 5 V ⎓ 2 5 0 m A O U T P U T : 4 . 6 V ⎓ 1 5 m A x 2 74.136 MM FCC ID: 2BAGA010021R FCC ID: 2BAGA010021L FCC ID: 2BAGA010021 IC: 31011-010021R IC: 31011-010021L IC: 31011-010021 FIT XXX-XXXXXX XXX-XXXXXX XXX-XXXXXX MODELS: Case 010021, Left Earbud 010021L, Right Earbud 010021R 0 1 0 0 2 1 The information will be silk screened on the bottom of the charging case

. MeasurementReportforDevice,,,UID0-,Channel0(2450.000MHz) DeviceunderTestProperties Model,ManufacturerDimensions[mm]IMEIDUTType Device,50.0x10.0x8.0Dipole ExposureConditions PhantomSection, TSL Position,Test Distance[mm] BandGroup, UID Frequency[MHz], ChannelNumber ConversionFactorTSLConductivity [S/m] TSLPermittivity Flat, HeadSimulating Liquid ,CW, 0-- 2450.000, 0 7.911.7838.3 HardwareSetup PhantomTSL,MeasuredDateProbe,CalibrationDateDAE,CalibrationDate Twin-SAMV8.0(30degprobetilt)- 2100 HBBL-600-10000Charge:xxxx,2026-05- 06 EX3DV4-SN7733,2025-09-08DAE4Sn1739,2025-09-08 ScanSetup AreaScanZoomScan GridExtents[mm]40.0x80.030.0x30.0x30.0 GridSteps[mm]10.0x10.05.0x5.0x1.5 SensorSurface[mm]3.01.4 GradedGridN/AYes GradingRatioN/A1.5 MAIAN/AN/A SurfaceDetectionVMS+6pVMS+6p ScanMethodMeasuredMeasured MeasurementResults AreaScanZoomScan Date2026-05-06,09:092026-05-06,09:15 psSAR1g[W/kg]4.814.85 psSAR10g[W/kg]2.242.28 PowerDrift[dB]-0.040.14 PowerScalingDisabledDisabled ScalingFactor[dB] TSLCorrectionNocorrectionNocorrection M2/M1[%]80.6 Dist3dBPeak[mm]9.1 Warning(s)/Error(s) DetailsAreaScanZoomScan Warning(s) Error(s)

. MeasurementReportforDevice,EDGELEFT,ISM2.4GHzBand,UID10038CAA,Channel78(2480.000MHz) DeviceunderTestProperties Model,ManufacturerDimensions[mm]IMEIDUTType Device,75.0x75.0x25.0ChargingCase ExposureConditions PhantomSection, TSL Position,Test Distance[mm] BandGroup, UID Frequency[MHz], ChannelNumber ConversionFactorTSLConductivity [S/m] TSLPermittivity Flat, HeadSimulating Liquid EDGERIGHT, 0.00 ISM2.4GHz Band Bluetooth, 10038-CAA 2480.000, 78 7.911.8238.3 HardwareSetup PhantomTSL,MeasuredDateProbe,CalibrationDateDAE,CalibrationDate Twin-SAMV8.0(30degprobetilt)- 2100 HBBL-600-10000Charge:xxxx,2026-05- 06 EX3DV4-SN7733,2025-09-08DAE4Sn1739,2025-09-08 ScanSetup AreaScanZoomScan GridExtents[mm]60.0x120.030.0x30.0x30.0 GridSteps[mm]10.0x10.05.0x5.0x1.5 SensorSurface[mm]3.01.4 GradedGridN/AYes GradingRatioN/A1.5 MAIAYN/A SurfaceDetectionVMS+6pVMS+6p ScanMethodMeasuredMeasured MeasurementResults AreaScanZoomScan Date2026-05-06,16:412026-05-06,16:49 psSAR1g[W/kg]0.3340.416 psSAR10g[W/kg]0.1690.182 PowerDrift[dB]-0.000.01 PowerScalingDisabledDisabled ScalingFactor[dB] TSLCorrectionNocorrectionNocorrection M2/M1[%]69.1 Dist3dBPeak[mm]4.0 Warning(s)/Error(s) DetailsAreaScanZoomScan Warning(s) Error(s) . MeasurementReportforDevice,EDGELEFT,ISM2.4GHzBand,UID10670AAA,Channel19(2440.000MHz) DeviceunderTestProperties Model,ManufacturerDimensions[mm]IMEIDUTType Device,75.0x75.0x25.0ChargingCase ExposureConditions PhantomSection, TSL Position,Test Distance[mm] BandGroup, UID Frequency[MHz], ChannelNumber ConversionFactorTSLConductivity [S/m] TSLPermittivity Flat, HeadSimulating Liquid EDGELEFT, 0.00 ISM2.4GHz Band Bluetooth, 10670-AAA 2440.000, 19 7.911.7838.4 HardwareSetup PhantomTSL,MeasuredDateProbe,CalibrationDateDAE,CalibrationDate Twin-SAMV8.0(30degprobetilt)- 2100 HBBL-600-10000Charge:xxxx,2026-05- 06 EX3DV4-SN7733,2025-09-08DAE4Sn1739,2025-09-08 ScanSetup AreaScanZoomScan GridExtents[mm]60.0x120.030.0x30.0x30.0 GridSteps[mm]10.0x10.05.0x5.0x1.5 SensorSurface[mm]3.01.4 GradedGridN/AYes GradingRatioN/A1.5 MAIAYN/A SurfaceDetectionVMS+6pVMS+6p ScanMethodMeasuredMeasured MeasurementResults AreaScanZoomScan Date2026-05-06,18:122026-05-06,18:29 psSAR1g[W/kg]0.2790.228 psSAR10g[W/kg]0.1190.100 PowerDrift[dB]-0.050.01 PowerScalingDisabledDisabled ScalingFactor[dB] TSLCorrectionNocorrectionNocorrection M2/M1[%]72.7 Dist3dBPeak[mm]6.1 Warning(s)/Error(s) DetailsAreaScanZoomScan Warning(s) Error(s)

Annual Verification Result Dipole2450 Head TSL Target Value Measure Value Difference R（Ω） X（jΩ） R（Ω） X（jΩ） R（Ω） X（jΩ） Impedance 52.71 4.199 51.24 -4.500 -1.47 -8.70 Return loss(dB) -26.266 -26.73 1.8% Measure Date 15-Dec-25

The results reported herein have been performed in accordance with the laboratory’s terms of accreditation. This report shall not be reproduced except in full without the written approval of the Laboratory. The results in this report apply to the test sample(s) mentioned above at the time of the testing period only and are not to be used to indicate applicability to other similar products. SAR EVALUATION REPORT FCC 47 CFR § 2.1093 IEEE Std. 1528-2013 For Charging Case MODEL NUMBER: 010021 REPORT NUMBER: 4792167330-1-SAR-1 ISSUE DATE: May 8, 2026 FCC ID: 2BAGA010021 Prepared for Drowsy Digital Inc 850 New Burton Road Suite 201 19904 Dover Delaware United States 19904 Prepared by UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch Room 101, Building 2, No.4, Information Road, Songshan Lake, Dongguan, Guangdong, China Tel: +86 769 22038881 Fax: +86 769 33244054 Website: www.ul.com Website: www.ul.com REPORT NO.: 4792167330-1-SAR-1 Page 2 of 26 UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch FORM NO: 10-SL-F0036 This report shall not be reproduced except in full, without the written approval of UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch. Revision History Rev. Issue Date Revisions Revised By V0 May 8, 2026 Initial Issue \ Note: 1) This test report is only published to and used by the applicant, and it is not for evidence purpose in China. 2) The measurement result for the sample received is <Pass> according to < IEEE Std. 1528>when <Simple Acceptance> decision rule is applied. REPORT NO.: 4792167330-1-SAR-1 Page 3 of 26 UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch FORM NO: 10-SL-F0036 This report shall not be reproduced except in full, without the written approval of UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch. Table of Contents 1. Attestation of Test Results .......................................................................................................... 4 2. Test Specification, Methods and Procedures ............................................................................ 5 3. Facilities and Accreditation ......................................................................................................... 6 4. SAR Measurement System & Test Equipment ........................................................................... 7 4.1. SAR Measurement System .............................................................................................................. 7 4.2. SAR Scan Procedures ..................................................................................................................... 8 4.3. Test Equipment .............................................................................................................................. 10 5. Measurement Uncertainty ......................................................................................................... 11 6. Device Under Test (DUT) Information ....................................................................................... 12 6.1. DUT Description............................................................................................................................. 12 6.2. Wireless Technology ...................................................................................................................... 12 7. Conducted Output Power Measurement and tune-up tolerance ............................................ 13 7.1. Test Results of 2.4GHz BT ............................................................................................................ 13 7.1. Test Results of 2.4GHz BLE .......................................................................................................... 13 7.2. Duty Cycle ..................................................................................................................................... 14 8. Test Configuration ..................................................................................................................... 15 8.1. 2.4GHz BT/BLE SAR Test Requirements .......................................................................................... 15 8.2. Repeated measurements .................................................................................................................. 16 9. RF Exposure Conditions ........................................................................................................... 17 10. Dielectric Property Measurements & System Check ............................................................... 18 10.1. Dielectric Property Measurements ................................................................................................. 18 10.2. System Check ................................................................................................................................ 20 11. Measured and Reported (Scaled) SAR Results ....................................................................... 22 11.1. SAR Test Results of BT ................................................................................................................. 23 11.1. SAR Test Results of BLE ............................................................................................................... 24 12. Simultaneous Transmission SAR Analysis ............................................................................. 25 12.1. Simultaneously transmit SAR calculations ..................................................................................... 25 Appendixes ........................................................................................................................................... 26 4792167330-1-SAR-1_Appendixes A Photo .................................................................................................. 26 4792167330-1-SAR-1_Appendixes B System Check Plots ...........................................................................…

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The results reported herein have been performed in accordance with the laboratory’s terms of accreditation. This report shall not be reproduced except in full without the written approval of the Laboratory. The results in this report apply to the test sample(s) mentioned above at the time of the testing period only and are not to be used to indicate applicability to other similar products. FCC 47 CFR PART 15 SUBPART C ISED RSS-247 Issue 4 TEST REPORT For Charging Case MODEL NUMBER: 010021 REPORT NUMBER: 4792167330-1-RF-2 ISSUE DATE: May 7, 2026 FCC ID:2BAGA010021 IC:31011-010021 Prepared for Drowsy Digital Inc 850 New Burton Road Suite 201 19904 Dover Delaware United States 19904 Prepared by UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch Room 101, Building 2, No.4, Information Road, Songshan Lake, Dongguan, Guangdong, China Tel: +86 769 22038881 Fax: +86 769 33244054 Website: www.ul.com REPORT NO.: 4792167330-1-RF-2 Page 2 of 100 UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch FORM NO: 10-SL-F0035 This report shall not be reproduced except in full, without the written approval of UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch. Revision History Rev. Issue Date Revisions Revised By V0 May 7, 2026 Initial Issue REPORT NO.: 4792167330-1-RF-2 Page 3 of 100 UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch FORM NO: 10-SL-F0035 This report shall not be reproduced except in full, without the written approval of UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch. Summary of Test Results Test Item Clause Limit/Requirement Result Antenna Requirement N/A FCC 15.203 RSS-GEN Clause 6.8 Pass AC Power Line Conducted Emission ANSI C63.10-2020 Clause 6.2 FCC Part 15.207 Pass Conducted Output Power ANSI C63.10-2020 Clause 7.8.5 FCC 15.247 (b) (1) RSS-247 Clause 6.2.3.2 Pass 20 dB Bandwidth and 99% Occupied Bandwidth ANSI C63.10-2020 Clause 6.9.2 & 6.9.3 FCC 15.247 (a) (1) RSS-247 Clause 6.2.3.1 (a) RSS-Gen Clause 6.7 Pass Carrier Hopping Channel Separation ANSI C63.10-2020 Clause 7.8.2 FCC 15.247 (a) (1) RSS-247 Clause 6.2.3.1 (a) Pass Number of Hopping Frequency ANSI C63.10-2020 Clause 7.8.3 15.247 (a) (1) III RSS-247 Clause 6.2.3.1 (b) Pass Time of Occupancy (Dwell Time) ANSI C63.10-2020 Clause 7.8.4 15.247 (a) (1) III RSS-247 Clause 6.2.3.1 (b) Pass Conducted Bandedge and Spurious Emission ANSI C63.10-2020 Clause 6.10.4 & Clause 7.8.7 FCC 15.247 (d) RSS-247 Clause 6.6 Pass Radiated Band edge and Spurious Emission ANSI C63.10-2020 Clause 6.4 & 6.5 & 6.6 & 7.8.8 FCC 15.247 (d) FCC 15.209 FCC 15.205 RSS-247 Clause 6.6 RSS-GEN Clause 8.9 RSS-GEN Clause 8.10 Pass Duty Cycle ANSI C63.10-2020, Clause 11.6 None; for reporting purposes only. Pass Note: 1. 1.For ISED, this report is also performed according to ANSI C63.10-2020 + Cor.1-2023 + C63.10a-2024 + Errata to C63.10a-2024 standards. 2.For FCC, this report is also performed according to ANSI C63.10-2020 + Cor.1-2023. *This test report is only published to and used by the applicant, and it is not for evidence purpose in China. *The measurement result for the sample received is <Pass> according to <FCC 47 CFR PART 15 SUBPART C, ISED RSS-247 Issue 4> when <Simple Acceptance> decision rule is applied. Decision rule for statement of conformity: The measurement uncertainty is not taken into account for statement of conformity. REPORT NO.: 4792167330-1-RF-2 Page 4 of 100 UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch FORM NO: 10-SL-F0035 This report shall not be reproduced except in full, without the written approval of UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch. CONTENTS 1. ATTESTATION OF TEST RESULTS ..................................................................................... 6 2. TEST METHODOLOGY ......................................................................................................... 7 3. FACILITIES AND ACCREDITATION ..................................................................................... 7 4. CALIBRATION AND UNCERTAINTY ................................................................................... 8 4.1. MEASURING INSTRUMENT CALIBRATION ........................................................... 8 4.2. MEASUREMENT UNCERTAINTY ............................................................................ 8 5. EQUIPMENT UNDER TEST .................................................................................................. 9 5.1. DESCRIPTION OF EUT ........................................................................................... 9 5.2. CHANNEL LIST ........................................................................................................ 9 5.3. MAXIMUM POWER .................................................................................................. 9 5.4. TEST CHANNEL CONFIGURATION ...................................................................... 10 5.5. THE WORSE CASE POWER SETTING PARAMETER .......................................... 10 5.6. DESCRIPTION OF AVAILABLE ANTENNAS ......................................................... 11 5.7. SUPPORT UNITS FOR SYSTEM TEST ................................................................. 12 6. MEASURING EQUIPMENT AND SOFTWARE USED......................................................... 14 7. ANTENNA PORT TEST RESULTS ..................................................................................... 17 7.1. CONDUCTED OUTPUT POWER .......................................................................... 17 7.2. 20 DB BANDWIDTH AND 99% OCCUPIED BANDWIDTH ..................................... 18 7.3. CARRIER HOPPING CHANNEL SEPARATION ..................................................... 20 7.4. NUMBER OF HOPPING FREQUENCY .................................................................. 22 7.5. TIME OF OCCUPANCY (DWELL TIME) ...........................................................…

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1 ANTENNA TEST REPORT Applicant Drowsy Digital, INC Address 850 New Burton Road, Suite 201, Dover DE 19904 Supplier Shenzhen Top-link Technologies Co.,Ltd. 3rd Floor, Building A3, Zhengfeng Industrial Park, No.610 Fengtang Avenue, Zhancheng Community, Fuhai Street, Baoan District, Shenzhen, China. Product OZLO Sleepbuds 2 Product No. 01 002 1 C01 WW 01 Model 01 002 1 Peak Gain Charge case antennae (PN: 1030045-01): BT/-0.2dBi/open；BT/1.1dBi/close ； BLE/0dBi/open；BLE/1.3dBi/close Test person Liu Feng Date of test 2026/03/24 Approval Written Reviewed Approved Liu Feng Jiang Lingqing Zhu Senyin Data 2026/03/24 2026/03/25 2026/03/25 2 ANTENNA TEST REPORT TABLE OF CONTENTS 1. MEASUREMENTS SETUP .................................................................................3 2. PHOTOGRAPHS OF ANTENNA ........................................................................3 3. TEST INSTRUMENTS .......................................................................................5 4. MEASUREMENTS DESCRIPTION.......................................................................5 5. TEST RESULTS .................................................................................................5 6. PHOTOGRAPHS OF THE TEST CONFIGURATION.............................................13 3 1. MEASUREMENTS SETUP 2. PHOTOGRAPHS OF ANTENNA RF Cables LAN Network Analyzer Turntable 4 3. TEST INSTRUMENTS Equipment Manufacturer Model No. Serial No. Calibrated Date Calibrated Until Antenna chamber GTS RayZone 1800 CT10116480A2084 2025/10/28 2026/10/27 Signal Generator ROHDE&SCHWARZ ZND 100269 2025/10/28 2026/10/27 Test Software GTS Libra N/A N/A 4. MEASUREMENTS DESCRIPTION 1. S Parameter Measurements A testing method for evaluating the signal reflection performance of antennas. S Parameter measurements were done by using Network Analyzer –ROHDE&SCHWARZ, the Return Loss of the antennas were obtained to ensure the efficiency over the operation frequency. 2. Antenna Radiation Patten Measurements The distribution of radiation power from antennas in different directions. Radiation Pattern Measurements were done in the GTS anechoic chamber through radiation, the earbuds were set to continuous radiation and the RayZone 1800 receive the RF power from 360 degree angles by using rotation of DUT (Device under test). 3. Antenna Gain Calculation Antenna gain is an important parameter for measuring antenna radiation. The antenna gains will be calculated by GTS chamber software when radiation pattern tests are done. 5. TEST RESULTS 5.1 CHARGE CASE BLE ANTENNA VSWR Frequency (MHz) 2400 2480 Open state 2.3 3.3 Close state 2.5 1.7 5 5.2 CHARGE CASE BT ANTENNA VSWR Frequency (MHz) 2400 2480 Open state 2.2 2.7 Close state 2.5 1.4 5.5 CHARGE CASE BLE ANTENNA EFFICIENCY Frequency (MHz) 2400~2485 Open state 29.9% Close state 46.2% 5.6 CHARGE CASE BT ANTENNA EFFICIENCY Frequency (MHz) 2400~2485 Open state 38.3% Close state 53.6% 5.9 CHARGE CASE BLE ANTENNA OPEN STATE 2D Frequency (MHz) XY XZ YZ 2400 Peak Gain (dBi) -4.6 -2.4 -1.2 Degree 30° 210° 30° 2440 Peak Gain (dBi) -2.7 -0.9 -0.6 Degree 0° 60° 30° 2485 Peak Gain (dBi) -2.5 -1.6 -2 Degree 0° 60° 30° 6 7 5.10 CHARGE CASE BLE ANTENNA CLOSE STATE 2D Frequency (MHz) XY XZ YZ 2400 Peak Gain (dBi) -3.8 -1.4 1.2 Degree 180° 300° 300° 2440 Peak Gain (dBi) -1.5 -0.2 1.3 Degree 180° 300° 300° 2485 Peak Gain (dBi) -1.2 -0.6 1.2 Degree 180° 210° 300° 8 5.11 CHARGE CASE BT ANTENNA OPEN STATE 2D Frequency (MHz) XY XZ YZ 2400 Peak Gain (dBi) -3.4 -1.9 -1.8 Degree 150° 150° 30° 2440 Peak Gain (dBi) -1.7 -0.8 -1.2 Degree 0° 300° 30° 2485 Peak Gain (dBi) -1.4 -1 -1.8 Degree 0° 120° 150° 9 5.12 CHARGE CASE BT ANTENNA CLOSE STATE 2D Frequency (MHz) XY XZ YZ 2400 Peak Gain (dBi) -1.4 -1.1 0 Degree 0° 60° 330° 2440 Peak Gain (dBi) 0.1 1.1 0 Degree 0° 60° 210° 2485 Peak Gain (dBi) 0.2 0.8 1 Degree 0° 60° 210° 10 6. PHOTOGRAPHS OF THE TEST CONFIGURATION