2BRKV-1018Stem2

AshDust UK Limited Unit 12.1 - 12.2, 11-29 Fashion Street LONDON, E1 6PX United Kingdom Date: 2025/09/03 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2BRKV-1018 FRN: 0037382728 US Agent – Attestation Statement / Part 2.911(d)(7) AshDust UK Limited certifies, that as of 2025/09/03, we have designated FCC US Agent, LLC to accept service of process on our behalf for FCC ID: 2BRKV-1018. AshDust UK Limited, accepts to maintain an agent of service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission- related administrative or judicial proceeding involving the equipment, whichever is later. FCC US Agent, LLC, accepts as of the date of the filing of this application, the obligation of being the designated agent for the purpose of accepting service of process on behalf of AshDust UK Limited for FCC ID: 2BRKV-1018. Designated Agent Information: Company Name: FCC US Agent, LLC FRN: 0033402884 Address: 3722 Illinois Avenue, Saint Charles, IL, 60174, USA Contact Person: Tim Payne Phone: 708-571-3148 Email: [email protected] Sincerely, Company: AshDust UK Limited Designated Agent: FCC US Agent, LLC Company Representative: jingjing li Designated Agent Representative: Tim Payne Signature: Signature:

Rev 1/26/2023 AshDust UK Limited Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 08-25-2025 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2BRKV-1018 AshDust UK Limited (“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. AshDust UK Limited (“the applicant”) certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Sincerely, Signature Jingjing Li Rev 1/26/2023 AshDust UK Limited Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 08-25-2025 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2BRKV-1018 AshDust UK Limited (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, Signature Jingjing Li

AshDust UK Limited Date: August 27, 2025 FCC ID: 2BRKV-1018 Model Number: 1018 To: Federal Communication Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21048 To Whom It May Concern, We, AshDust UK Limited declare that this EUT (FCC ID: 2BRKV-1018) will conduct FCC compliance testing, the SDOC part recognized test lab(Shenzhen NTEK Testing Technology Co., Ltd.( ShenZhen Lab.). No. 24 Xinfa East Road, Xiangshan Community, Xinqiao Street, Baoan District, Shenzhen, Guangdong, People's Republic of China). This applies to Part 15B compliance. Please contact me if you have any question. Sincerely, (Signed) Name / Title: jingjing li / Manager Company: AshDust UK Limited Address: Unit 12.1 - 12.2, 11-29 Fashion Street, LONDON, E1 6PX, United Kingdom

AshDust UK Limited Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 8/27/2025 SUBJECT: FCC Application for FCC ID: 2BRKV-1018 To Whom It May Concern: We, the undersigned, hereby authorize Alex Li at Shenzhen NTEK Testing Technology Co., Ltd. on our behalf, to apply to the Federal Communications Commission on our equipment. Any and all acts carried out by Shenzhen NTEK Testing Technology Co., Ltd. on our behalf shall have the same effect as acts of our own. This is to advise that we are in full compliance with the Anti- Drug Abuse Act. We, the applicant, are not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 USC853a, and no party to the application is subject to a denial of federal benefits pursuant to that section. Regards, (signature) (printed name): jingjing li

AshDust UK Limited Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 8/27/2025 Subject; Request for Confidentiality FCC ID: 2BRKV-1018 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description SOFTWARE SECURITY REQUIREMENTS FOR U-NII DEVICES In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuantto KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: jingjing li Title: manager Email: [email protected]

IMPORTANT: IN CONFIDENCE THIS DRAWING AND ANY INFORMATION OR DESCRIPTIVE MATERIAL SET OUT ON IT ARE THE CONFIDENTIAL AND COPYRIGHT PROPERTY OF KANO COMPUTING AND MUST NOT BE DISCLOSED, COPIED, LOANED IN WHOLE OR PART OR USED FOR ANY PURPOSE WITHOUT A WRITTEN PERMISSION. Date: FIRST ANGLE Drawn: HAD Mass [g]: A3 Sheet 1 OF 1 Scale: 1:1 Material: AA BB CC DD EE FF GG 10 10 9 9 8 8 7 7 6 6 5 5 4 4 3 3 2 2 1 1 ASM_0001_STEM SPEAKER_CONFIG C_v4.35 NOTES: 1. REFER TO RELATED 3D MODEL FOR REFERENCES OR MISSING DIMENSIONS. 2. PARTS TO BE SUPPLIED FREE FROM DENTS, SCRATCHES, BURRS AND BLEMISHES. 3. UNLESS OTHERWISE STATED: ALL DIMENSIONS ARE IN MM. DO NOT SCALE IF IN DOUBT ASK PROJECTION ±0.03mm ±0.05mm ±0.07mm ±0.10mm ±0.13mm ±0.16mm ±0.20mm ±0.25mm ±0.20mm ±0.50mm ±1mm ±0.5° up to 1 over 1 to 10 over 10 up to 30 over 30 up to 60 over 60 up to 100 over 100 up to 150 over 150 up to 200 over 200 0.5 up to 3 over 3 up to 6 over 6 TOLERANCES UNLESS STATED OTHERWISE PERMISSIBLE DEVIATIONS FOR NOMINAL DIMENSION RANGES TOLERANCE CLASS m (medium)f (ne)c (coarse) ±0.05mm ±0.10mm ±0.15mm ±0.20mm ±0.25mm ±0.30mm ±0.35mm ±0.40mm ±0.20mm ±0.50mm ±1mm ±1° ±0.10mm ±0.20mm ±0.30mm ±0.40mm ±0.50mm ±0.60mm ±0.70mm ±0.80mm ±0.40mm ±1mm ±2mm ±1° EXTERNALRADIUS ANDCHAMFER   LINEAR DIMENSIONS ANGLES IMPORTANT: IN CONFIDENCE THIS DRAWING AND ANY INFORMATION OR DESCRIPTIVE MATERIAL SET OUT ON IT ARE THE CONFIDENTIAL AND COPYRIGHT PROPERTY OF KANO COMPUTING AND MUST NOT BE DISCLOSED, COPIED, LOANED IN WHOLE OR PART OR USED FOR ANY PURPOSE WITHOUT A WRITTEN PERMISSION. Date: FIRST ANGLE Drawn: HAD Mass [g]: A3 Sheet 1 OF 1 Scale: 1:1 Material: AA BB CC DD EE FF GG 10 10 9 9 8 8 7 7 6 6 5 5 4 4 3 3 2 2 1 1 ASM_0001_STEM SPEAKER_CONFIG C_v4.35 NOTES: 1. REFER TO RELATED 3D MODEL FOR REFERENCES OR MISSING DIMENSIONS. 2. PARTS TO BE SUPPLIED FREE FROM DENTS, SCRATCHES, BURRS AND BLEMISHES. 3. UNLESS OTHERWISE STATED: ALL DIMENSIONS ARE IN MM. DO NOT SCALE IF IN DOUBT ASK PROJECTION ±0.03mm ±0.05mm ±0.07mm ±0.10mm ±0.13mm ±0.16mm ±0.20mm ±0.25mm ±0.20mm ±0.50mm ±1mm ±0.5° up to 1 over 1 to 10 over 10 up to 30 over 30 up to 60 over 60 up to 100 over 100 up to 150 over 150 up to 200 over 200 0.5 up to 3 over 3 up to 6 over 6 TOLERANCES UNLESS STATED OTHERWISE PERMISSIBLE DEVIATIONS FOR NOMINAL DIMENSION RANGES TOLERANCE CLASS m (medium)f (ne)c (coarse) ±0.05mm ±0.10mm ±0.15mm ±0.20mm ±0.25mm ±0.30mm ±0.35mm ±0.40mm ±0.20mm ±0.50mm ±1mm ±1° ±0.10mm ±0.20mm ±0.30mm ±0.40mm ±0.50mm ±0.60mm ±0.70mm ±0.80mm ±0.40mm ±1mm ±2mm ±1° EXTERNALRADIUS ANDCHAMFER   LINEAR DIMENSIONS ANGLES

FCC ID: 2BRKV-1018 Maximum Permissible Exposure (MPE) According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) Radiation as specified in §1.1307(b) According to KDB447498 D01 General RF Exposure Guidance V06 Limits for Maximum Permissible Exposure (MPE) MPE Calculation Method E (V/m) ＝ d G P * * 30 Power Density: Pd (W/m²) ＝ 377 2 E E ＝ Electric field (V/m) P ＝ Average RF output power (W) G ＝ EUT Antenna numeric gain (numeric) d ＝ Separation distance between radiator and human body (m) The formula can be changed to Pd ＝ 2 * 377 * * 30 D G P From the EUT RF output power, the minimum mobile separation distance, d=0.2m, as well as the gain of the used antenna, the RF power density can be obtained. Calculated Result BT: conducted power Evaluation result Power density Limits (dBm) (mW) (dBi) Numeric 2402 6.64 6±1 7 5.012 0.7 1.17 0.001171 1 2440 6.58 6±1 7 5.012 0.7 1.17 0.001171 1 2480 6.82 6±1 7 5.012 0.7 1.17 0.001171 1 Channel Freq. (MHz) Band Tune-up power (dBm) (dBm) (mW/cm2 ) (mW/cm2) Antenna Gain 8DPSK Max tune-up power BLE: conducted power Evaluation result Power density Limits (dBm) (mW) (dBi) Numeric 2402 4.32 4±1 5 3.162 0.7 1.17 0.000739 1 2440 4.22 4±1 5 3.162 0.7 1.17 0.000739 1 2480 4.25 4±1 5 3.162 0.7 1.17 0.000739 1 (mW/cm2 ) (mW/cm2) Antenna Gain GFSK Max tune-up power Channel Freq. (MHz) Band Tune-up power (dBm) (dBm) Wi-Fi 2.4G: conducted power Evaluation result Power density Limits (dBm) (mW) (dBi) Numeric 2412 15.39 15±1 16 39.811 0.5 1.12 0.008886 1 2437 15.34 15±1 16 39.811 0.5 1.12 0.008886 1 2462 15.24 15±1 16 39.811 0.5 1.12 0.008886 1 Channel Freq. (MHz) Band Tune-up power (dBm) (dBm) (mW/cm2 ) (mW/cm2) Antenna Gain 802.11b Max tune-up power Wi-Fi 5G: conducted power Evaluation result Power density Limits (dBm) (mW) (dBi) Numeric 5180 14.974 14±1 15 31.623 3.5 2.24 0.014084 1 5200 14.942 14±1 15 31.623 3.5 2.24 0.014084 1 5240 13.771 14±1 15 31.623 3.5 2.24 0.014084 1 5745 14.986 14±1 15 31.623 3.5 2.24 0.014084 1 5785 13.7 14±1 15 31.623 3.5 2.24 0.014084 1 5825 13.824 14±1 15 31.623 3.5 2.24 0.014084 1 (mW/cm2) Antenna Gain 802.11n20 Max tune-up power Channel Freq. (MHz) Band Tune-up power (dBm) (dBm) 802.11n20 (mW/cm2 ) NFC: Transmit power: Freq. Field Strength(dBuV/m) Factor EIRP (dBm) 13.56MHz 67.98 95.2 -27.22 Evaluation result Power density Limits (dBm)(mW) 13.56NFC-27.22 0.0020.00000040.98 Channel Freq. (MHz) Band (mW/cm2 )(mW/cm2) Max tune-up power Max. Simultaneous Transmissions Mode Mode Standalone (mW/cm 2 ) Limits (mW/cm 2 ) Sum Limits BT+WIFI 5.2G+NFC 0.001171 1 0.015255 1 0.014084 1 0.0000004 0.98 Conclusion: For the max result: 0.015255≤1, Compliance with RF Exposure requirement. Signature: Date: 11/18/2025 NAME AND TITLE (Please print or type): Alex Li/Manager COMPANY (Please print or type): No. 24 Xinfa East Road, Xiangshan Community, Xinqiao Street, Baoan District, Shenzhen, Guangdong, People's Republic of China

1 Sa m pl e Sp eci fic ati on Customer: Golden Harvest Project Name: CA-7580B Material Category: BT Antenna + WIFI Antenna + NFC Antenna Version: V1.0 Date: 2024.6.22 Subscribe to DeepL Pro to translate larger documents. Visit www.DeepL.com/pro for more information. 2 Catalog I: Passive Test Report...................................................................................................................................................................... 3 II: Antenna Darkroom Data .......................................................................................................................................................... 9 III: NFC Antenna Matching Circuit .......................................................................................................................................... 10 IV: Structure Files.......................................................................................................................................................................... 11 Change Record Column Date of Preparation/Change Reason for change Content of change Version: 2024.6.22 2024.6.22 Initial release First Release V1.0 3 I: Passive Test Report Angilent E5071C BT Antenna S11 Parameters 4 BT antenna efficiency and gain: BT Frequency Gain Efficiency db Efficiency 2400 0.5 -3.0 50.6 2410 0.3 -3.2 48.4 2420 0.2 -3.3 46.7 2430 0.4 -3.2 48.2 2440 0.5 -3.2 47.6 2450 0.7 -2.9 51.3 2460 0.6 -2.7 54.1 2470 0.4 -2.9 51.3 2480 0.6 -3.0 50.3 Average 0.5 -3.0 49.8 BT Antenna 2D Orientation Diagram Theta=90.00deg 5 Phi=0.00deg Phi=90.00deg 6 WIFI Antenna S11 Specifications WIFI antenna efficiency and gain: WIFI Frequency Gain Efficiency db Efficiency % Frequency Gain Efficiency db Efficiency 2400 0.4 -3.1 49.5 5150 3.5 -3.7 43.0 2410 0.4 -3.1 49.0 5200 2.9 -4.0 39.8 2420 0.3 -3.2 48.0 5250 2.7 -3.8 41.4 2430 0.1 -3.4 45.4 5300 2.7 -3.5 44.9 2440 -0.2 -3.6 43.3 5350 2.6 -3.7 42.3 2450 -0.1 -3.6 43.7 5400 1.9 -3.9 41.1 2460 -0.5 -3.8 41.7 5450 1.6 -4.0 39.5 2470 0.0 -3.5 44.4 5500 2.9 -3.5 44.5 2480 0.5 -3.2 47.3 5550 2.3 -3.8 41.9 Mean 0.1 -3.4 45.8 5600 2.0 -4.138.7 5650 2.4 -3.8 41.4 5700 2.4 -3.7 42.2 5750 2.7 -3.7 42.4 5800 2.4 -3.6 43.5 43.5 2.6 -3.6 44.1 Average 2.5 -3.8 42.0 7 WIFI Antenna 2D Orientation Diagram (2.4G) Theta=90.00deg Phi=0.00deg Phi=90.00deg WIFI Antenna 2D Orientation Diagram (5G) Theta=90.00deg 8 Phi=0.00deg Phi=90.00deg II: Antenna Darkroom Data 9 Channel TRP (dBm) TIS (dBm) CH 0 8.2 -TIS (dBm) CH 39 8.3 -92.6 TIS (dBm) CH 78 7.6 -92.2 54M Channel TRP (dBm) TIS (dBm) CH 1 4.2 -TIS (dBm) CH 6 5.4 CH 6 5.4 -71.5 WIFI A CH 11 4.4 -70.7 11M Channel TRP (dBm) TIS (dBm) CH 1 -4.2 -84.1 CH 6 CH 6 -4.3 -84.9 WIFI B CH 11 -4.6 -84.6 NFC distance test: OTA Standard Chamber III: NFC Antenna Matching Circuit 10 11 IV: Structure 12 13

CC-JL-RD-36V1.0 1 Antenna Part Specification Project name： CA-7580B Material category： BT antenna Antenna type： dipole Manufacturer： Shenzhen Cicent Communication Technology Co., Ltd. Manufacturer address： 505-506 ,ABlock,Donglian Building,Chuangye 2 road,Baoan District,Shenzhen,Guangdong,P.R china Version： V2.0 Date： 2024.12.17 CC-JL-RD-36V1.0 2 Contents I: The report of passive data ...................................................................................................................................................... 3 II：Antenna structure diagram file............................................................................................................................................ 6 Change record Compile / change date Reason for change Changed content Version 2024.6.22 First edition First edition V1.0 2024.12.17 Image file update Image file update V2.0 CC-JL-RD-36V1.0 3 I: The report of passive data Angilent E5071C antenna S11 parameter： CC-JL-RD-36V1.0 4 Efficiency： BT Frequency (Mhz) Gain(dBi) Efficiency(db) Efficiency(%) 2400 0.5 -3.0 50.6 2410 0.3 -3.2 48.4 2420 0.2 -3.3 46.7 2430 0.4 -3.2 48.2 2440 0.5 -3.2 47.6 2450 0.7 -2.9 51.3 2460 0.6 -2.7 54.1 2470 0.4 -2.9 51.3 2480 0.6 -3.0 50.3 AVG 0.5 -3.0 49.8 2D Antenna radiation pattern: Theta=90° CC-JL-RD-36V1.0 5 Phi=0° Phi=90° OTA Standard Chamber CC-JL-RD-36V1.0 6 II：Antenna structure diagram file

CC-JL-RD-36V1.0 1 Antenna Part Specification Project name： CA-7580B Material category： WIFI antenna Antenna type： PIFA Manufacturer： Shenzhen Cicent Communication Technology Co., Ltd. Manufacturer address： 505-506 ,ABlock,Donglian Building,Chuangye 2 road,Baoan District,Shenzhen,Guangdong,P.R china Version： V2.0 Date： 2024.12.17 CC-JL-RD-36V1.0 2 Contents I: The report of passive data ...................................................................................................................................................... 3 II：Antenna structure diagram file............................................................................................................................................ 7 Change record Compile / change date Reason for change Changed content Version 2024.6.22 First edition First edition V1.0 2024.12.17 Image file update Image file update V2.0 CC-JL-RD-36V1.0 3 I: The report of passive data Angilent E5071C antenna S11 parameter： CC-JL-RD-36V1.0 4 Efficiency： WIFI Frequency (Mhz) Gain(dBi) Efficiency (db) Efficiency (%) Frequency (Mhz) Gain(dBi) Efficiency (db) Efficiency (%) 2400 0.4 -3.1 49.5 5150 3.5 -3.7 43.0 2410 0.4 -3.1 49.0 5200 2.9 -4.0 39.8 2420 0.3 -3.2 48.0 5250 2.7 -3.8 41.4 2430 0.1 -3.4 45.4 5300 2.7 -3.5 44.9 2440 -0.2 -3.6 43.3 5350 2.6 -3.7 42.3 2450 -0.1 -3.6 43.7 5400 1.9 -3.9 41.1 2460 -0.5 -3.8 41.7 5450 1.6 -4.0 39.5 2470 0.0 -3.5 44.4 5500 2.9 -3.5 44.5 2480 0.5 -3.2 47.3 5550 2.3 -3.8 41.9 AVG 0.1 -3.4 45.8 5600 2.0 -4.1 38.7 5650 2.4 -3.8 41.4 5700 2.4 -3.7 42.2 5750 2.7 -3.7 42.4 5800 2.4 -3.6 43.5 5850 2.6 -3.6 44.1 AVG 2.5 -3.8 42.0 2D Antenna radiation pattern: (2.4G) Theta=90° CC-JL-RD-36V1.0 5 Phi=0° Phi=90° 2D Antenna radiation pattern: (5G) Theta=90° CC-JL-RD-36V1.0 6 Phi=0° Phi=90° OTA Standard Chamber CC-JL-RD-36V1.0 7 II：Antenna structure diagram file

Report No.: S24101501301002 Version.1.3 Page 1 of 43 RADIO TEST REPORT FCC ID: 2BRKV-1018 Product: Stem2 Trade Mark: N/A Model No.: 1018 Family Model: N/A Report No.: S24101501301002 Issue Date: Oct. 31, 2025 Prepared for AshDust UK Limited Unit 12.1 - 12.2, 11-29 Fashion Street, LONDON, E1 6PX, United Kingdom Prepared by Shenzhen NTEK Testing Technology Co., Ltd. No. 24 Xinfa East Road, Xiangshan Community, Xinqiao Street, Baoan District, Shenzhen, Guangdong, People's Republic of China Tel. 0755-2320 0050 Website: http://www.ntek.org.cn Report No.: S24101501301002 Version.1.3 Page 2 of 43 TABLE OF CONTENTS 1 TEST RESULT CERTIFICATION ...................................................................................................................... 4 2 SUMMARY OF TEST RESULTS ......................................................................................................................... 5 3 FACILITIES AND ACCREDITATIONS ............................................................................................................. 6 3.1 FACILITIES..................................................................................................................................................... 6 3.2 LABORATORY ACCREDITATIONS AND LISTINGS ................................................................................. 6 3.3 MEASUREMENT UNCERTAINTY ............................................................................................................... 6 4 GENERAL DESCRIPTION OF EUT .................................................................................................................. 7 5 DESCRIPTION OF TEST MODES ..................................................................................................................... 9 6 SETUP OF EQUIPMENT UNDER TEST ......................................................................................................... 10 6.1 BLOCK DIAGRAM CONFIGURATION OF TEST SYSTEM ..................................................................... 10 6.2 SUPPORT EQUIPMENT ............................................................................................................................... 11 6.3 EQUIPMENTS LIST FOR ALL TEST ITEMS .............................................................................................. 12 7 TEST REQUIREMENTS .................................................................................................................................... 14 7.1 CONDUCTED EMISSIONS TEST ............................................................................................................... 14 7.1.1 Applicable Standard .................................................................................................................................. 14 7.1.2 Conformance Limit ................................................................................................................................... 14 7.1.3 Measuring Instruments ............................................................................................................................. 14 7.1.4 Test Configuration .................................................................................................................................... 14 7.1.5 Test Procedure ........................................................................................................................................... 14 7.1.6 Test Results ................................................................................................................................................ 15 7.2 RADIATED SPURIOUS EMISSION ............................................................................................................ 17 7.2.1 Applicable Standard .................................................................................................................................. 17 7.2.2 Conformance Limit ................................................................................................................................... 17 7.2.3 Measuring Instruments ............................................................................................................................. 18 7.2.4 Test Configuration .................................................................................................................................... 18 7.2.5 Test Procedure ........................................................................................................................................... 19 7.2.6 Test Results ................................................................................................................................................ 19 7.3 6DB BANDWIDTH ....................................................................................................................................... 24 7.3.1 Applicable Standard .................................................................................................................................. 24 7.3.2 Conformance Limit ................................................................................................................................... 24 7.3.3 Measuring Instruments ............................................................................................................................. 24 7.3.4 Test Setup .................................................................................................................................................. 24 7.3.5 Test Procedure ........................................................................................................................................... 24 7.3.6 Test Results ................................................................................................................................................ 24 7.4 99% OCCUPIED BANDWIDTH .................................................................................................................. 25 7.4.1 A…

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Report No.: S24101501301003 Version.1.3 Page 1 of 83 FCC RADIO TEST REPORT FCC ID: 2BRKV-1018 Product: Stem2 Trade Mark: N/A Model No.: 1018 Family Model: N/A Report No.: S24101501301003 Issue Date: Oct. 31, 2025 Prepared for AshDust UK Limited Unit 12.1 - 12.2, 11-29 Fashion Street, LONDON, E1 6PX, United Kingdom Prepared by Shenzhen NTEK Testing Technology Co., Ltd. No. 24 Xinfa East Road, Xiangshan Community, Xinqiao Street, Baoan District, Shenzhen, Guangdong, People's Republic of China Tel. 0755-2320 0050 Website: http://www.ntek.org.cn Report No.: S24101501301003 Version.1.3 Page 2 of 83 TABLE OF CONTENTS 1 TEST RESULT CERTIFICATION ...................................................................................................................... 3 2 SUMMARY OF TEST RESULTS ......................................................................................................................... 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 ......................................................................................................... 10 6.1 BLOCK DIAGRAM CONFIGURATION OF TEST SYSTEM ..................................................................... 10 6.2 SUPPORT EQUIPMENT ............................................................................................................................... 11 6.3 EQUIPMENTS LIST FOR ALL TEST ITEMS .............................................................................................. 12 7 TEST REQUIREMENTS .................................................................................................................................... 14 7.1 CONDUCTED EMISSIONS TEST ............................................................................................................... 14 7.2 RADIATED SPURIOUS EMISSION ............................................................................................................ 17 7.3 6DB BANDWIDTH ....................................................................................................................................... 25 7.4 99% OCCUPIED BANDWIDTH .................................................................................................................. 26 7.5 DUTY CYCLE ............................................................................................................................................... 27 7.6 MAXIMUM OUTPUT POWER .................................................................................................................... 28 7.7 POWER SPECTRAL DENSITY ................................................................................................................... 29 7.8 CONDUCTED BAND EDGE MEASUREMENT......................................................................................... 30 7.9 SPURIOUS RF CONDUCTED EMISSIONS ................................................................................................ 31 7.10 ANTENNA APPLICATION .......................................................................................................................... 32 8 TEST RESULTS ................................................................................................................................................... 33 8.1 DUTY CYCLE .................................................................................................................................................. 33 8.2 MAXIMUM CONDUCTED OUTPUT POWER ....................................................................................................... 40 8.3 -6DB BANDWIDTH .......................................................................................................................................... 41 8.4 OCCUPIED CHANNEL BANDWIDTH .................................................................................................................. 48 8.5 MAXIMUM POWER SPECTRAL DENSITY LEVEL ............................................................................................... 55 8.6 BAND EDGE .................................................................................................................................................... 62 8.7 CONDUCTED RF SPURIOUS EMISSION ............................................................................................................. 71 Report No.: S24101501301003 Version.1.3 Page 3 of 83 1 TEST RESULT CERTIFICATION Applicant’s name ......................... : AshDust UK Limited Address ....................................... : Unit 12.1 - 12.2, 11-29 Fashion Street, LONDON, E1 6PX, United Kingdom Manufacturer's Name .................. : AshDust UK Limited Address ....................................... : Unit 12.1 - 12.2, 11-29 Fashion Street, LONDON, E1 6PX, United Kingdom Product description Product name .............................. : Stem2 …

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