C3K2149Portable Computing Device

Date: 6/23/2026 Federal Communications Commissions Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 RE: CFR 47 §2.911 (d)(5) Attestation FCC ID: C3K2149 1. Microsoft Corporation (“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. 2. Microsoft Corporation (“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. Microsoft Corporation (“the applicant”) 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, Michael Boucher Compliance Engineer, Microsoft Corporation.

Date: January 25, 2024 FederalCommunicationsCommissions Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 RE: CFR 47 §2.911 (d)(7) Agent Designation Attestation Grantee Code: C3K To whom it may concern: Microsoft Corporation (“the applicant”)as required by section §2.911(d)(7), will also serve as the agent for service of process. The applicant acknowledges that they will maintain an agent for no less than one year after thegranteehas terminatedall marketing andimportationortheconclusion ofanyCommission- 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. Company Name:MicrosoftCorporation Contact Person: Hasnain Syed FCC FRN: 0006275291 CompanyUSAddress:OneMicrosoftWay,RedmondWA98052 Email: [email protected] Sincerely, Name: Hasnain Syed Title/Company: Sr. Director EMC/SI/RF Compliance, Microsoft Corporation

Microsoft Corporation is an equal opportunity employer. 7/14/2026 Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 RE: e-Label Statement FCC ID: C3K2149 To whom it may concern: This device’s label and user information is compliant in accordance to FCC KDB 784748. The e-label will display the FCC ID and the Part 15.19(a)(3) statement. Per KDB 784748 4.1 & 4.2, users will be provided clear instructions on how to access the regulatory information stored electronically without requiring special access codes, permissions or accessories / supplemental plug-ins (i.e., SIM/USIM cards) or having to go through multiple steps (no more than three) in the device’s menu. Per KDB 784748 4.3, The FCC ID will be displayed in a manner clearly legible without the aid of magnification per 2.935(e). Per KDB 784748 4.4, The above information will be programmed by Microsoft and the information will be secured in such manner that it will not be able to be modified or removed by any third party during the course of normal usage (e.g. installation of applications, accessing the menus, etc.) without Microsoft’s consent. Per KDB 784748 4.5, A physical label will be on the product packaging at the time of importation, marketing and/or sales. The removable label used we be able to survive normal shipping and handling and it will be removed only by the customer after purchase. The removable label will include the FCC ID. Sincerely, Michael Boucher Compliance Engineer, Microsoft Corporation.

Microsoft Corporation is an equal opportunity employer. 7/6/2026 Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 To whom it may concern: I, the undersigned, hereby authorize RF Safety Laboratory, LLC to act on our behalf in all manners relating to application for equipment authorization, including signing of all documents relating to these matters. Any and all acts carried out by RF Safety Laboratory, LLC on our behalf shall have the 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, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). In authorizing RF Safety Laboratory, LLC 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) 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; Microsoft Corporation is an equal opportunity employer. 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 that products are certified as being in conformity with specified standards; g) Endeavor to ensure that no certificate nor report nor any part thereof is used in a misleading manner; h) Ensure that any reference to our product certification in communication media such as documents, brochures or advertising, complies with the requirements of the Certification Division; i) Keep a record of all complaints made known to us relating to the product’s compliance with requirements of the relevant standard and to make these records available to the when requested; j) Take appropriate action with respect to such complaints and any deficiencies found in products or services that affect compliance with the requirements for certification; k) Document the actions taken. This authorization is valid until further written notice from the applicant. Sincerely, Michael Boucher Compliance Engineer, Microsoft Corporation.

Microsoft Corporation is an equal opportunity employer. 6/23/2026 Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 To whom it may concern: I, the undersigned, hereby authorize Underwriters Laboratories LLC to act on our behalf in all manners relating to application for equipment authorization, including signing of all documents relating to these matters. Any and all acts carried out by Underwriters Laboratories LLC on our behalf shall have the 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, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). In authorizing Underwriters Laboratories LLC 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) 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; Microsoft Corporation is an equal opportunity employer. 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 that products are certified as being in conformity with specified standards; g) Endeavor to ensure that no certificate nor report nor any part thereof is used in a misleading manner; h) Ensure that any reference to our product certification in communication media such as documents, brochures or advertising, complies with the requirements of the Certification Division; i) Keep a record of all complaints made known to us relating to the product’s compliance with requirements of the relevant standard and to make these records available to the when requested; j) Take appropriate action with respect to such complaints and any deficiencies found in products or services that affect compliance with the requirements for certification; k) Document the actions taken. This authorization is valid until further written notice from the applicant. Sincerely, Michael Boucher Compliance Engineer, Microsoft Corporation.

Microsoft Corporation is an equal opportunity employer. 7/1/2026 Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 Subject: Request for Confidentiality for FCC ID: C3K2149 To Whom It May Concern: Pursuant to the provisions of Sections 0.457 and 0.459 of the Commission’s rules (47 CFR § 0.457, § 0.459), we are requesting the Commission to withhold the following attachments as confidential document from public disclosure Long Term Confidentiality. •Operational Description •Schematics •Block Diagram The above mentioned documents contain detailed system and equipment descriptions that are considered as proprietary information in the operation of the equipment. Public disclosure of the above documents might be harmful to our company and would give competitors an unfair advantage in the market. In additional to above mentioned documents, pursuant to Public Notice DA 04- 1705 of the Commission’s policy, in order to comply with the marketing regulations in 47 CFR §2.803 and the importation rules in 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of Microsoft Corporation is an equal opportunity employer. newly authorized devices, we are requesting the commission to grant short-term confidentiality on the following attachments until 1/1/2027 • External Photos • Test Setup Photos • User’s Manual • Internal Photos It is our understanding that all measurement test reports, FCC ID label format and correspondence during certification review process cannot be granted as confidential documents and the information will be available for public review once the grant of equipment authorization is issued. Sincerely, Michael Boucher Compliance Engineer, Microsoft Corporation.

Model 2149 Label Location Model 2149 FCC ID: C3K2149 Contains FCC ID: C3K00002101 IC: 3048A 2149 Contains IC: 3048A-00002101 CAN ICES-3 (B)/NMB-3 (B)

FCC ID: C3K2149 IC: 3048A-2149 SAR-001: SAR Test Report RevA Test Report SN: 2026.030.01 Page A1 of A2 Appendix A: SAR Test Plots RF SAFETY LABORATORY DUT: 2149; SN: R7B26 Test Conditions Exposure Condition Position, Test Distance [mm] Band Signal, UID Ant. Channel Number Frequency [MHz] ConvF (x,y,z) Body Flat, BACK, 0.00 NFC WPT CW, 0 WPT N/A 13.600 14.3, 16.56,15.27 Test Setup Test Date Ambient Temp [°C] TSL Temp [°C] Measurement SW Phantom Type Cond. [S/m] TSL Perm. Probe, Cal. Date DAE, Cal. Date 2026-05-20 22.8 23.4 16.4.0.5005 ELI V8.0 - 2216 Head Simulating Liquid 0.752 52.9 EX3DV4 - SN7872, 2025-08-08 DAE4ip Sn1843, 2025-07-30 Scans Setup Area Scan Zoom Scan Grid Extents [mm] 300.0 x 240.0 30.0 x 30.0 x 31.2 Grid Steps [mm] 15.0 x 15.0 6.0 x 6.0 x 1.5 Sensor Surface [mm] 3.0 1.4 Grading Ratio N/A 1.5 MAIA Y Y Measurement Results psSAR1g [W/Kg] 0 Power Drift [dB] 0.11 Peak SAR (Extrapolated) [W/kg] 0.002 M2/M1 [%] 16.2 Dist 3dB Peak [mm] 0.0 FCC ID: C3K2149 IC: 3048A-2149 SAR-001: SAR Test Report RevA Test Report SN: 2026.030.01 Page A2 of A2 RF SAFETY LABORATORY DUT: 2149; SN: R7B26 Test Conditions Exposure Condition Position, Test Distance [mm] Band Signal, UID Ant. Channel Number Frequency [MHz] ConvF (x,y,z) Body Flat, BACK, 0.00 NFC Reader CW, 0 NFC N/A 13.600 14.3, 16.56,15.27 Test Setup Test Date Ambient Temp [°C] TSL Temp [°C] Measurement SW Phantom Type Cond. [S/m] TSL Perm. Probe, Cal. Date DAE, Cal. Date 2026-05-20 22.8 23.4 16.4.0.5005 ELI V8.0 - 2216 Head Simulating Liquid 0.752 52.9 EX3DV4 - SN7872, 2025-08-08 DAE4ip Sn1843, 2025-07-30 Scans Setup Area Scan Zoom Scan Grid Extents [mm] 300.0 x 240.0 30.0 x 30.0 x 31.2 Grid Steps [mm] 15.0 x 15.0 6.0 x 6.0 x 1.5 Sensor Surface [mm] 3.0 1.4 Grading Ratio N/A 1.5 MAIA Y Y Measurement Results psSAR1g [W/Kg] 0 Power Drift [dB] 0.17 Peak SAR (Extrapolated) [W/kg] 0 M2/M1 [%] 43.9 Dist 3dB Peak [mm] 0.0

FCC ID: C3K2149 IC: 3048A-2149 SAR-001: SAR Test Report RevA Test Report SN: 2026.030.01 Page B1 of B3 Appendix B: Tissue Stimulating Liquids, System Checks and System Validation B.1. SAR System Check Prior to SAR assessment, the system is verified to ±10% of the SAR measurement on the reference dipole at the time of calibration by the calibration facility. SAR System Validation was performed and complies with requirements per IEC/IEEE 62209-1528. Table 1 System Check Results (SAR) B.2. Dielectric Parameters of the TSL Table 2 SAR Tissue Dielectric Parameters The above measured tissue parameters were used in the DASY software. The DASY software was used to perform interpolation to determine the dielectric parameters at the SAR test device frequencies (per KDB Publication 865664 D01v01r04 and IEEE 1528-2013 6.6.1.2). The tissue parameters listed in the SAR test plots may slightly differ from the table above due to significant digit rounding in the software. The SAR values were compensated for deviations between the measured and required tissue dielectric properties, as described in IEEE 1528-2013. The SAR values were applied to only scale up the measured SAR values, and not downward, per KDB Publication 865664 D01v04r04. B.3. FCC System Validation Per FCC KDB Publication 865664 D02 Section 2.3 a) states “SAR system validation status and system verification results should be documented in a separate section of the SAR report, or as an attachment, to confirm measurement accuracy.” The SAR systems used for evaluating this device were validated against its performance specifications prior to the SAR measurements. Reference dipoles were used with the required tissue-equivalent media for system validation, according to the procedures outlined in FCC KDB Publication 865664 D01 and IEEE 1528-2013. Since SAR probe calibrations are frequency dependent, each probe calibration point was validated at a frequency within the valid frequency range of the probe calibration point. System Frequency (MHz) Tissue Type Date Amb. Temp. (°C) Tissue Temp (°C) Input Power (dBm) Verification Source SN Probe SN DAE SN Measured 1g SAR (W/Kg) 1W Target 1g SAR (W/Kg) 1W Normalized 1g SAR (W/Kg) 1g SAR Deviation Measured 10g SAR (W/Kg) 1W Target 10g SAR (W/Kg) 1W Normalized 10g SAR (W/Kg) 10g SAR Deviation Gamma13Head5/20/202622.823.424.51041787218430.1370.4570.4866.37%0.0840.2960.2980.69% Date Tissue Type Liquid Temp (°C)Frequency (MHz) Conductivity Measured (σ) Conductivity Target (σ) Deviation Permittivity measured (εr) Permittivity Target (εr) Deviation 5/20/2026Head23.2100.750.750.30%53.055.0-3.61% 5/20/2026Head23.2150.750.750.31%52.855.0-3.92% FCC ID: C3K2149 IC: 3048A-2149 SAR-001: SAR Test Report RevA Test Report SN: 2026.030.01 Page B2 of B3 Per FCC KDB 865664 D02, “the validation status should be documented according to the validation date(s), measurement frequencies, SAR probes, calibrated signal type(s) and tissue dielectric parameters.” A tabulated summary of the system validation status is provided accordingly: Table 3 System Validation NOTE: The probes have been calibrated for both CW and modulated signals. Modulations in the table above represent test configurations for which the measurement system has been validated per FCC KDB Publication 865664 D01 for scenarios when CW probe calibrations are used with other signal types. SAR systems were additionally validated for modulated signals with a periodic duty cycle or with a high PAR (peak to average ratio) >5 dB, such as OFDM according to FCC KDB Publication 865664 D01 v01r04. Freq (MHz) Tissue Type Sensitivity Probe Linearity Probe Isotropy Mod Type Duty Factor PAR Gamma1311/14/20257872184313Head0.69552PASSPASSPASSN/AN/AN/A Cond. (σ)Perm (εr) CW ValidationMod Validation System Frequency (MHz) Date Probe DAE Probe CalF FCC ID: C3K2149 IC: 3048A-2149 SAR-001: SAR Test Report RevA Test Report SN: 2026.030.01 Page B3 of B3 B.4. Sample TSL Compositions TSL recipes are proprietary to SPEAG. Since the composition is approximate to the actual liquids utilized, the manufacturer data sheets are provided below. Figure 1 - Head TSL Calibration Certificate Example (4 – 250 MHz)

FCC ID: C3K2149 IC: 3048A-2149 SAR-001: SAR Test Report RevA Test Report SN: 2026.030.01 Page C1 of C1 Appendix C: System Check Plots RF SAFETY LABORATORY System Verification Verification Conditions Verification Source Power [dBm] Phantom Section Test Distance [mm] Signal, UID Frequency [MHz] ConvF (x, y, z) CLA-13 - SN1041 24.5 Flat 0 CW, 0 13.000 14.3, 16.56,15.27 Test Setup Test Date Ambient Temp [°C] TSL Temp [°C] Measurement SW Phantom TSL Type Cond. [S/m] Perm. Probe, Cal. Date DAE, Cal. Date 2026-05-20 22.8 23.4 16.4.0.5005 ELI V8.0 - 2216 Head Simulating Liquid 0.752 52.9 EX3DV4 - SN7872, 2025-08-08 DAE4ip Sn1843, 2025-07-30 Scans Setup Area Scan Zoom Scan Grid Extents [mm] 40.0 x 90.0 30.0 x 36.0 x 31.2 Grid Steps [mm] 10.0 x 15.0 6.0 x 6.0 x 1.5 Sensor Surface [mm] 3.0 1.4 Grading Ratio N/A 1.5 Measurement Results SAR [W/kg] or APD [W/m²] Deviation [%] psSAR1g 0.137 6.37 psSAR10g 0.084 0.69 Peak SAR (Extrapolated) 0.287 8.07 psAPD (4.0 cm², sq) N/A N/A

RF Safety Laboratory, LLC 5520 Research Park Drive, Suite 140 Catonsville, Maryland 21228 USA +1 202 240 9240 [email protected] Object: Date Issued: CLA13 – SN: 1041 07/30/2025 Page 1 of 3 IN-HOUSE SAR VERIFICATION SOURCE CALIBRATION EXTENSION Object CLA13 – SN: 1041 Description SAR Validation Source at 13 MHz Procedure (s) Procedure for SAR Verification Source Calibration Extension In-house Check Date 07/30/2025 Equipment List CBT: Components calibrated before testing. Prior to testing, the measurement paths containing a cable, attenuator, coupler or filter were connected to a calibrated source (i.e. a signal generator, power sensor, or VNA) to determine the losses of the measurement path. The power meter offset was then adjusted to compensate for the measurement system losses. This level offset is stored within the power meter before measurements are made. This calibration verification procedure applies to the system verification and output power measurements. The calibrated reading is then taken directly from the power meter after compensation of the losses for all final power measurements. Measurement Uncertainty = ±27% (k=2) Name Function Signature Tested By: Yue Li Engineer Approved By: Phuong Nguyen Technical Manager ManufacturerModelDescriptionSerial Number Calibration Date Calibration Due CBT Rohde & SchwarzZNL20Vector Network Analyzer1012029/12/249/12/25 Rohde & SchwarzZN-Z135VNA Calibration Kit5000-30919283910/31/2410/31/26 Control Company4040Ambient Thermometer2305816578/28/238/28/25 Control Company4040Ambient Thermometer2305816628/28/238/28/25 Control Company4352Long Stem Liquid Thermometer2306622239/28/239/28/25 Control Company4352Long Stem Liquid Thermometer2306622129/28/239/28/25 Micro-CoaxUFB205A-0-0240-30x30SMA M-F RF test Cable (DC - 18 GHz)-✓ Maury-Micro360D10dB RF Fixed Attenuator (DC - 18 GHz) + Short Circuit Termination779912/28/2412/28/25 Huber+SuhnerSF126High Performance RF Cable570292/126✓ Mini-CircuitsVLF-8400+Coaxial Low Pass Filter (DC - 8.4 GHz)-✓ SPEAGDAE4ipData Acquisition Electrionics with Integ. Power18399/4/249/4/25 SPEAGDAK-12DAK-12 Dielectric Probe119410/14/2410/14/25 SPEAGEX3DV4SAR Measurement Probe78369/12/249/12/25 AnritsuMA24118AMicrowave USB Power Sensor (10MHz - 18 GHz)21234311/13/251/13/26 Rohde & SchwarzSMCV100BR&S SMCV100B Vector Signal Generator (VSG)10388212/21/2312/19/25 Mini-CircuitsCBL-6FT-SMNM+Precision Test Cable SMA/N (DC - 18 GHz)3318✓ RF Safety Laboratory, LLC 5520 Research Park Drive, Suite 140 Catonsville, Maryland 21228 USA +1 202 240 9240 [email protected] Object: Date Issued: CLA13 – SN: 1041 07/30/2025 Page 2 of 3 Per FCC KDB Publication 865664 D01, dipole can have longer calibration intervals of up to three years when it is demonstrated that the SAR target, impedance and return loss of the dipole have remained stable according to the following requirements: 1. Measured SAR does not deviate from the calibrated SAR value by more than 10%. 2. Return loss does not deviate by more than 20% from the previous measurement (i.e. value in dB x 0.2) and meet the required minimum return-loss. 3. Real and imaginary part of the impedance do not deviate by more than 5 Ω from the previous measurement. The following dipole was checked to pass the above 3 requirements to have an extended calibration interval: Dipole SN Freq (MHz) In-house Check Date Cal Date Head SAR target (1g) @ 30dBm ( W/kg) Measured Head SAR (1g) @ 17d Bm (W/kg) 1g SAR Dev ( %) Head SAR target (10g) @ 30d Bm (W/kg) Measured Head SAR (10g) @ 17d Bm (W/kg) 10g SAR Dev(%) Cert Head Impedance (Ohm) - Re al Previous Head Impedance ( Ohm) - Real Measured Head Impedance ( Ohm) - Real Head Impedance Deviation ( Ohm) - Real Cert Head Impedance (Ohm) - I maginary Previous Head Impedance ( Ohm) - Imaginary Measured Head Impedance ( Ohm) - Imaginary Head Impedance Deviation ( Ohm) - Imaginary Cert Head Return L oss (dB) Previous Head Return L oss (dB) Measured Head Return L oss (dB) Return Loss Dev (%) PASS/FAILNote 10411311/13/202410/11/202400.000.00%00.000.00%54.554.553.0-1.5-0.9-0.9-3.5-2.6-27.1-27.1-27.02.10%PASSIn-house check after Calibration 1041137/30/202510/11/20240.4570.13-0.62%0.2960.08-5.30%54.553.054.61.6-0.9-3.5-1.02.5-27.1-27.0-27.01.10%PASS- RF Safety Laboratory, LLC 5520 Research Park Drive, Suite 140 Catonsville, Maryland 21228 USA +1 202 240 9240 [email protected] Object: Date Issued: CLA13 – SN: 1041 07/30/2025 Page 3 of 3 Impedance and Return-Loss Measurement Plot for Head TSL

Next Generation Test Laboratory Inc. (RF Safety Laboratory, LLC) ) 5520 Research Park Drive, Suite 140, Catonsville, Maryland 21228 USA FCC Designation Number: US3274 ANAB 17025 Certificate Number: AT-3274 ☎+1 202 240 9240; [email protected] FCC ID: C3K2149 IC: 3048A-2149 SAR-001: SAR Test Report RevA Test Report S/N: 2026.030.01 Page 1 of 11 SAR EVALUATION REPORT FCC ID: C3K2149 IC: 3048A-2149 Model/HVIN/PMN: 2149 Device Type: Portable Tablet Report Issue Date: June 27, 2026 Microsoft Corporation One Microsoft Way, Redmond, WA 98052, United States Certification The measurement evaluations presented in this report are based on the maximum performance of the tested device(s), which has been shown to be capable of compliance for localized specific absorption rate (SAR) for uncontrolled environment/ general population exposure federal limits in 47CFR § 1.1310 and has been tested in accordance with the measurement procedures specified within this report. This document must be reproduced in its entirety without any alterations unless with written permission from RF Safety Laboratory, LLC. Steve Liu President FCC Equipment Class Body SAR [W/kg] 1g Simultaneous Tx SAR [W/kg] DXX< 0.10 FCC Limit1.61.6 1.60 Exposure Condition Body SAR [W/kg] TER Overall Worst Case0.00 0.75 ISED Limits1.61.0 Next Generation Test Laboratory Inc. (RF Safety Laboratory, LLC) ) 5520 Research Park Drive, Suite 140, Catonsville, Maryland 21228 USA FCC Designation Number: US3274 ANAB 17025 Certificate Number: AT-3274 ☎+1 202 240 9240; [email protected] FCC ID: C3K2149 IC: 3048A-2149 SAR-001: SAR Test Report RevA Test Report S/N: 2026.030.01 Page 2 of 11 Table of Contents 1. DUT Specifics .......................................................................................................................................... 3 2. DUT SAR Test Results .............................................................................................................................. 3 3. DUT SAR Measurement Variability Requirement ...................................................................................... 4 4. General Introduction ............................................................................................................................... 4 5. Background on Radiofrequency (RF) Exposure Limits ............................................................................... 5 6. RF Safety Laboratory SAR Measurement System ...................................................................................... 7 7. Equipment List ...................................................................................................................................... 10 8. Conclusion ............................................................................................................................................ 11 Appendix A: SAR Test Plots Appendix B: Tissue Stimulating Liquids, System Checks and System Validation Appendix C: System Check Plots Appendix D: Calibration Certificates Appendix E : DUT Antenna Diagram and Test Setup Photos Next Generation Test Laboratory Inc. (RF Safety Laboratory, LLC) ) 5520 Research Park Drive, Suite 140, Catonsville, Maryland 21228 USA FCC Designation Number: US3274 ANAB 17025 Certificate Number: AT-3274 ☎+1 202 240 9240; [email protected] FCC ID: C3K2149 IC: 3048A-2149 SAR-001: SAR Test Report RevA Test Report S/N: 2026.030.01 Page 3 of 11 1. DUT Specifics 1.1. Device under Test The device under test is a wireless device, incorporating NFC WPT and NFC reader with a WLAN/BT module. This report evaluates RF exposure for NFC WPT and NFC reader. WLAN/BT module RF exposure evaluation and simultaneous transmission analysis can be found in reports SN: 2026.030.06 and SN: 2026.030.07. The manufacturer has confirmed that the device is within operational tolerances expected for production units and has the same physical, mechanical, and thermal characteristics expected for production units. The serial number of the device used for each test is indicated alongside the results. 1.2. Test Guidance Applied • IEEE 1528-2013 (FCC) • IEC/IEEE 62209-1528:2020 (ISED) • RSS-102 Issue 6 (ISED) • RSS-102.SAR.MEAS (ISED) • Health Canada Safety Code 6 (ISED) • FCC KDB Publication 248227 D01v02r02 (SAR Considerations for 802.11 Devices) (FCC/ISED) • FCC KDB Publication 447498 D04v01 (General SAR Guidance) (FCC/ISED) • FCC KDB Publication 865664 D01v01r04, D02v01r02 (SAR Measurements up to 6 GHz) (FCC) • FCC KDB Publication 616217 D04 (SAR for laptop and tablets) (FCC/ISED) 2. DUT SAR Test Results 2.1. NFC WPT SAR Data Exposure ConditionBand/ModeAntennaAdditional InformationDUT SN Power Drift [dB] Frequency [MHz] Data Rate (Mbps) RB Offset Separation Distance [mm] Position Measured 1g SAR [W/kg] Reported 1g SAR [W/kg] Test Plot BodyNFC WPTWPT2149 R7B260.1113.56106kType B0Back0.0000.0001 BodyNFC WPTWPT2149 - Keyboard attached R7B260.2013.56106kType B0Back0.0000.000- BodyNFC WPTWPT2149 R7B26-0.1913.56106kType B0Top0.0000.000- BodyNFC WPTWPT2149 R7B26-0.2013.56106kType B0Bottom0.0000.000- BodyNFC WPTWPT2149 R7B260.2013.56106kType B0Right0.0000.000- BodyNFC WPTWPT2149 R7B260.1613.56106kType B0Left0.0000.000- Next Generation Test Laboratory Inc. (RF Safety Laboratory, LLC) ) 5520 Research Park Drive, Suite 140, Catonsville, Maryland 21228 USA FCC Designation Number: US3274 ANAB 17025 Certificate Number: AT-3274 ☎+1 202 240 9240; [email protected] FCC ID: C3K2149 IC: 3048A-2149 SAR-001: SAR Test Report RevA Test Report S/N: 2026.030.01 Page 4 of 11 2.2. NFC Reader SAR Data 2.3. General SAR Testing Notes: 1. The test data reported are the worst-case SAR values according to test procedures specified in IEEE 1528-2013 and FCC KDB Publication 447498 D04v01 for FCC. 2. The test data reported are the worst-case SAR values according to test procedures specified in IEC/IEEE 62209-1528 and RSS-102.SAR.MEAS for ISED. 3. Per IEC/IEEE 62209-1528, SAR testing was performed using probes calib…

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TEST REPORT Report Number: R16215818-E3 Applicant : Microsoft Corporation One Microsoft Way Redmond, Washington United States 98052-6399 Model : 2149 FCC ID : C3K2149 IC : 3048A-2149 EUT Description : Portable Computing Device Test Standard(s) : FCC 47 CFR PART 15 SUBPART C: 2026 RSS-210 ISSUE 11: 2024 RSS-GEN ISSUE 5 + A1 + A2: 2021 Date Of Issue: 2026-07-07 Prepared by: UL LLC 12 Laboratory Dr. Durham, NC 27713 U.S.A. TEL: (919) 549-1400 REPORT NO: R16215818-E3 DATE: 2026-07-07 FCC ID: C3K2149 IC: 3048A-2149 Page 2 of 25 UL LLC FORM NO: CCSUP4701I 12 Laboratory Drive, Durham, NC 27713; USA TEL:(919) 549-1400 This report shall not be reproduced except in full, without the written approval of UL LLC REPORT REVISION HISTORY Rev. Issue Date Revisions Revised By V1 2026-07-07 Initial Issue Manish Baral REPORT NO: R16215818-E3 DATE: 2026-07-07 FCC ID: C3K2149 IC: 3048A-2149 Page 3 of 25 UL LLC FORM NO: CCSUP4701I 12 Laboratory Drive, Durham, NC 27713; USA TEL:(919) 549-1400 This report shall not be reproduced except in full, without the written approval of UL LLC TABLE OF CONTENTS REPORT REVISION HISTORY ........................................................................................................... 2 TABLE OF CONTENTS ............................................................................................................…

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