2BA7V-SY01201Synido Audio Adapter

UNITED STATES DESIGNATED AGENT LETTER Date: April 1, 2026 TO: Federal Communication Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 Applicant U.S. designated agent Company Name: Shenzhen ArtFast Tech Co.,Ltd . Company Name: Picus Advisors US LLC Contact Name: Ling Cao Contact Name: Ivan Wang Address: 5Floor, Building 11, Longjun Industrial Zone, Longhua, Shenzhen, China Address: 5855 SOVEREIGN DRSTE B-1, HOUSTON, TX 77036, United States City/Province/Zip: Shenzheni City/Province/Zip: HOUSTON, TX 77036 Telephone: 0755-83285569 Telephone: (713) 391-4488 Email: [email protected] Email: [email protected] FRN: 0033777798 FRN: 0034336891 Applicable Equipment: FCC ID: 2BA7V-SY01201 ATTN: Director of Certification: We, < Shenzhen ArtFast Tech Co.,Ltd . > and <Picus Advisors US LLC> understand and acknowledge the applicants consent and the designated agent’s obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and e-mail of the designated agent listed above. We, < Shenzhen ArtFast Tech Co.,Ltd . > and <Picus Advisors US LLC> acknowledge the applicant’s acceptance of its obligation to maintain an agent for 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. Applicant Shenzhen ArtFast Tech Co.,Ltd . U.S. designated agent Picus Advisors US LLC Name (Printed): Ling Cao Name (Printed): Ivan Wang Title: Manager Title: CEO Signature: Signature:

Shenzhen ArtFast Tech Co.,Ltd Date: 1 April 2026 To: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Attestation Section 2.911(d)(5)(i) and Section 2.911(d)(5)(ii) (KDB 986446 D01 Covered Equipment) Section 2.911(d)(5)(i) Shenzhen ArtFast Tech Co.,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. The software to be loaded prior to marketing of the equipment identified below is not "covered" software manufactured by any entity including predecessors, successors, parents, subsidiaries, or affiliates or any entity which has rebranded or relabeled the software produced by the entity(ies) identified on the "Covered List" DA 24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Shenzhen ArtFast Tech Co.,Ltd (“the applicant”) further certifies that no 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 is installed in the equipment being certified. Section 2.911(d)(5)(ii) Shenzhen ArtFast Tech Co.,Ltd (“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. Type of Equipment subject to FCC Certification: FCC ID: 2BA7V-SY01201 If you have any questions, please feel free to contact me Contact Person: Ling Cao Position in the Company: Manager Date of Signature: 2025-11-18 ___________________________ Signatory (signature of the applicant)

Date: 1 April 2026 Shenzhen ArtFast Tech Co.,Ltd . To: Federal Communications Commission, Authorization & Evaluation Division, 7435 Oakland Mills Road, Columbia, MD 21046 To Whom It May Concern: The Shenzhen ArtFast Tech Co.,Ltd ., the undersigned, hereby authorizes Mr. Wu Xuewen from Shenzhen BALUN Technology Co., Ltd., to act on the behalf of the Shenzhen ArtFast Tech Co.,Ltd . solely in matters relating to the application for an FCC equipment authorization for FCC ID: 2BA7V-SY01201 including the signing of documents in connection with this Application. Necessary acts carried out by Shenzhen BALUN Technology Co., Ltd. in connection with the Application shall have the same effect as acts of the Shenzhen ArtFast Tech Co.,Ltd .. The Shenzhen ArtFast Tech Co.,Ltd . also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. Section 862. Yours Sincerely, _______ Ling Cao

Date: 1 April 2026 Shenzhen ArtFast Tech Co.,Ltd . To: Federal Communications Commission, Authorization & Evaluation Division, 7435 Oakland Mills Road, Columbia, MD 21046 Re: Shenzhen ArtFast Tech Co.,Ltd . FCC ID: 2BA7V-SY01201 FCC Certification Confidentiality Request Gentlemen: This letter is to comply with 47 CFR 0.457 and 0.459 pertaining to confidentiality material. Shenzhen ArtFast Tech Co.,Ltd . requests that the following documents regarding this submission for FCC ID: 2BA7V-SY01201 be kept confidential: Exhibit Type File Name Block Diagram Block Diagram.pdf Schematics Schematics.pdf Operational Description Operational Description.pdf And below exhibit kept short-term confidential (180 days): External photos External photos.pdf Test setup photos test photo.pdf Internal photos Internal photos.pdf User manual User manual.pdf Those documents contain detailed system and equipment description and related information about the product which Shenzhen ArtFast Tech Co.,Ltd . considers to be confidential proprietary, a custom design and, otherwise, not releasable to the general public. Since this design is a basis form which future technological products will evolve, Shenzhen ArtFast Tech Co.,Ltd . considers this information would be of benefit to its competitors, and that the disclosure of the information in these documents would give competitors an unfair advantage in the market. Yours Sincerely, Ling Cao

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Report No.: BL-SZ2620002-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 1 / 9 Web: www.titcgroup.com Template No.: TRP-FCC-Portable-2 (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China TEST REPORT Applicant: Shenzhen ArtFast Tech Co., Ltd Address: 5Floor, Building 11, Longjun Industrial Estate, Longping Community, Dalang subdistrict, Longhua District, Shenzhen, China Equipment Type: Synido Audio Adapter Model Name: Live Dock A30 Brand Name: Synido FCC ID: 2BA7V-SY01201 Test Standard: 47 CFR Part 2.1093 KDB 447498 D04 v01 Sample Arrival Date: Feb. 10, 2026 Test Date: Mar. 23, 2026 Date of Issue: Mar. 30, 2026 ISSUED BY: Shenzhen BALUN Technology Co., Ltd. Tested by: Xiong Lining Checked by: Xu Rui Approved by: Tolan Tu (Testing Director) _______________ _______________ _______________ Report No.: BL-SZ2620002-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 2 / 9 Web: www.titcgroup.com Template No.: TRP-FCC-Portable-2 (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China Revision History Version Issue Date Revisions Content Rev. 01 Mar. 30, 2026 Initial Issue TABLE OF CONTENTS 1 GENERAL INFORMATION ......................................................................................................... 3 1.1 Test Laboratory .............................................................................................................. 3 1.2 Test Location .................................................................................................................. 3 2 PRODUCT INFORMATION ......................................................................................................... 4 2.1 Applicant Information ...................................................................................................... 4 2.2 Manufacturer Information ............................................................................................... 4 2.3 General Description for Equipment under Test (EUT) ................................................... 4 2.4 Technical Information ..................................................................................................... 4 3 SUMMARY OF TEST RESULT ................................................................................................... 5 3.1 Test Standards ............................................................................................................... 5 4 DEVICE CATEGORY AND LEVELS LIMITS .............................................................................. 6 5 ASSESSMENT RESULT ............................................................................................................. 8 5.1 Output Power ................................................................................................................. 8 5.2 Tune-up power ............................................................................................................... 8 5.3 RF Exposure Evaluation Result ..................................................................................... 8 5.4 Conclusion ...................................................................................................................... 8 Report No.: BL-SZ2620002-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 3 / 9 Web: www.titcgroup.com Template No.: TRP-FCC-Portable-2 (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 1 GENERAL INFORMATION 1.1 Test Laboratory Name Shenzhen BALUN Technology Co., Ltd. Address Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China Phone Number +86 755 6685 0100 1.2 Test Location Name Shenzhen BALUN Technology Co., Ltd. Location Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 1/F, Building B, Ganghongji High-tech Intelligent Industrial Park, No. 1008, Songbai Road, Yangguang Community, Xili Sub-district, Nanshan District, Shenzhen, Guangdong Province, P. R. China Accreditation Certificate The laboratory is a testing organization accredited by FCC as a accredited testing laboratory. The designation number is CN1196. Report No.: BL-SZ2620002-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 4 / 9 Web: www.titcgroup.com Template No.: TRP-FCC-Portable-2 (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 2 PRODUCT INFORMATION 2.1 Applicant Information Applicant Shenzhen ArtFast Tech Co., Ltd Address 502 Building 11, Longjun Industrial Estate, Longping Community, Dalang subdistrict, Longhua District, Shenzhen, China 2.2 Manufacturer Information Manufacturer Shenzhen ArtFast Tech Co., Ltd Address 5Floor, Building 11, Longjun Industrial Estate, Longping Community, Dalang subdistrict, Longhua District, Shenzhen, China 2.3 General Description for Equipment under Test (EUT) EUT Name Synido Audio Adapter Model Name Under Test Live Dock A30 Series Model Name N/A Description of Model name differentiation N/A Hardware Version V1.0 Software Version V1.0 Dimensions (Approx.) N/A Weight (Approx.) N/A 2.4 Technical Information Network and Wireless connectivity Bluetooth (BLE) The requirement for the following technical information of the EUT was tested in this report: Operating Mode Bluetooth Frequency Range Bluetooth 2400 ~ 2483.5 MHz Antenna Type Bluetooth FPC Antenna Exposure Category General Population/Uncontrolled Exposure Product Type Portable Device Report No.: BL-SZ2620002-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 5 / 9 Web: www.titcgroup.com Template No.: TRP-FCC-Portable-2 (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi R…

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1 ShenZhen City FeiMin Technology CO.,LTD. SPECIFICATION FOR APPROVED CUSTOMER: Shenzhen Kuai Zhi Technology Co., Ltd. PRODUCTS: Chip antenna PART NO: Spec.: FM-S2430-S2 Data: 2025.10.9 REMARK:Please send us one(or copy)of this approval with stamp after accepting,other copies filed by the customer. ADD: Room 801, 8th Floor, Keyunda E-commerce Base, No. 4 Shenghui Road, Guxing Community, Xixiang Subdistrict, Baoan District, Shenzhen. Tel: 0755-23035723 Fax: 0755-23036702 E-mail: [email protected] HTTP:www.fmant.cn CUSTOMER ACCEPTED BY CHECKED BY APPROVED BY SUPPLIER PREPARED BY CHECKED BY APPROVED BY 飞敏科技 SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 1 1 1. Project Information 1.1. Appearance and Dimensions Symbol Dimension (mm) L（ length ） 7.0± 0.20 W（ width ） 3.0± 0.20 T（ thickness ） 2.0± 0.20 S（ Electrode width ） 0.5± 0.20 飞敏科技 SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 2 2 1.2. antenna Clearance area When designing the antenna, it should be far away from metal components and irrelevant components such as batteries, oscillators, shields, cameras, etc. to leave a clean space for the antenna. This interval is called clearance area. The following is the size of clearance area we recommend to reserve. Model size Clearance area L*W(mm) A1（2.4Gunipolar） 5.5*1.2*1.2 9.1*5.6 X5（2.4Gunipolar） 5.2*2.2*1.0 8.7*6.5 X6（2.4G pifa） 3.2*1.6*1.0 7.0*6.0 D1（2.4Gunipolar） 5.2*2.2*1.0 8.7*6.5 D2（2.4Gunipolar） 5.2*2.2*1.0 8.7*6.5 D3（2.4Gunipolar） 3.4*1.7*1.2 7.2*6.0 F01（2.4G pifa） 3.2*1.6*0.4 7.0*6.0 S2 （2.4/5.8Gdua l-frequency） 7.0*3.0*2.0 8.0*12.0 U1 (UHFunipolar） 15.0*3.0*1.0 19.0*8.0 G2（GPSunipolar） 9.5*3.0*1.0 13.5*7.5 飞敏科技 SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 3 3 1.3.Demo Test Board with Antenna(Unit:mm) 1.4. Matching Circuit With the following recommended values of matching and tuning components,the center frequencies will be about 2440 MHz at our standard 30*40 mm evaluation board.However,these are typical reference values which may need to be changed when circuit boards or part vendors are diffierent. 3 2 4 1 System Matching Circuit Component（Murata） Location Desciption Tolerance 1 8.2nH(0402) ±0.2nH 2 5.1nH(0402) ±0.2nH 3 1.2nH(0402) ±0.2nH 4 NC / ante 飞敏科技 SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 4 4 2. Electrical Characteristics 2.1. Electrical Table Characteristics Specifications Unit Outline Dimensions 7.0*3.0*2.0 mm Working Frequency 2400-2500/5150-5850 MHz VSWR <2 / Impedance 50 Ω Polarization linear polarization / Gain Peak 3 dBi 效率Efficiency 55 % 2.2. VSWR & return loss VSWR return loss 飞敏科技 SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 5 5 2.3. Gain and Efficiency Test system 飞敏科技 SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 6 6 Frequency (MHz) Gain (dBi) Efficiency (%) 2400 MHz 1.16 42.35 2410 MHz 1.17 43.43 2420 MHz 1.74 48.12 2430 MHz 1.83 49.82 2440 MHz 1.94 50.94 2450 MHz 1.86 52.98 2460 MHz 2.08 56.65 2470 MHz 2.41 50.32 2480 MHz 2.88 54.87 2490 MHz 2.7 49.91 2500 MHz 2.25 53.11 5150 MHz 0.32 40.57 5200 MHz 0.8 41.93 5250 MHz 1.78 46.26 5300 MHz 2.1 44.23 5350 MHz 2.46 46.64 5400 MHz 2.95 50.35 5450 MHz 3.09 43.02 5500 MHz 2.88 42.78 5550 MHz 2.5 42.37 5600 MHz 1.99 48.95 5650 MHz 1.18 43.9 5700 MHz 1.55 49.34 5750 MHz 2.17 44.66 5800 MHz 2.23 49.52 5850 MHz 2.87 48.46 飞敏科技 SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 7 7 2.4. Antenna radiation pattern [email protected] 2D-plane XOY @2.45GHz 2D-plane [email protected] 2D-plane YOZ @2.45GHz 飞敏科技 SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 8 8 [email protected] 2D-plane XOY @5.75GHz 2D-plane [email protected] 2D-plane YOZ @5.75GHz 3.Packaging Information 3.1. Tape specification Index A0 B0 K0 P0 P P2 φD0 W E F T Dimension(mm) 2.5± 0.1 5.5± 0.1 1.3± 0.1 4.0± 0.1 8.0± 0. 1 2.0± 0.1 1.5 +0.1 12.0 ±0.3 1.75 ±0.1 5.5± 0.1 0.3± 0.05 1. 10 sprocket hole pitch cumulative tolerance ±0.20. 2. Carrier camber is within 1 mm in 250 mm. 3. All dimensions meet EIA-481-C requirements. 4. Material :Transparent PS. 5. Packing length per 7" reel :24.6Meters. 飞敏科技 SHENZHEN FEIMIN TECHNOLOGY CO.,LTD. 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 9 9 6. Component load per 7" reel : 3000 pcs. 3.2. Reel specification Index A B C D Dimension(mm) 13.3±0.3 100±0.3 330±0.3 24.5±0.3 4. Notes 1) Products should be handled with care to avoid damage or contamination from perspiration and skin oils. 2) The use of tweezers or vacuum pick up is strongly recommended for individual components. 5. Storage Conditions 1) Recommended products should be used within 6 months form the time of delivery. 2) Storage environment condition ⚫ Temperature and humidity conditions:-10~40°C and 30~70%RH. ⚫ The packaging material should be kept where no chlorine or sulfur exists in the air. ⚫ Products should be storage in thewarehouse without heat shock,vibration,direct sunlight and so on

Report No.: BL-SZ2620002-601 Tel: +86-755-66850100 E-mail: [email protected] Page No. 1 / 62 Web: www.titcgroup.com Template No.: TRP-FCC Part 15.247 (2022-01-12) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China TEST REPORT Applicant: Shenzhen ArtFast Tech Co., Ltd Address: 5Floor, Building 11, Longjun Industrial Estate, Longping Community, Dalang subdistrict, Longhua District, Shenzhen, China Equipment Type: Synido Audio Adapter Model Name: Live Dock A30 Brand Name: Synido FCC ID: 2BA7V-SY01201 Test Standard: 47 CFR Part 15 Subpart C (refer to section 3.1) Sample Arrival Date: Feb. 10, 2026 Test Date: Feb. 11, 2026 - Mar. 15, 2026 Date of Issue: Mar. 30, 2026 ISSUED BY: Shenzhen BALUN Technology Co., Ltd. Tested by: Julie Zhu Checked by: Ye Hongji Approved by: Tolan Tu (Testing Director) _______________ _______________ _______________ Report No.: BL-SZ2620002-601 Tel: +86-755-66850100 E-mail: [email protected] Page No. 2 / 62 Web: www.titcgroup.com Template No.: TRP-FCC Part 15.247 (2022-01-12) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China Revision History Version Issue Date Revisions Rev. 01 Mar. 30, 2026 Initial Issue TABLE OF CONTENTS 1 GENERAL INFORMATION ......................................................................................................... 4 1.1 Test Laboratory .............................................................................................................. 4 1.2 Test Location .................................................................................................................. 4 2 PRODUCT INFORMATION ......................................................................................................... 5 2.1 Applicant Information ...................................................................................................... 5 2.2 Manufacturer Information ............................................................................................... 5 2.3 General Description for Equipment under Test (EUT) ................................................... 5 2.4 Technical Information ..................................................................................................... 6 3 SUMMARY OF TEST RESULTS ................................................................................................. 8 3.1 Test Standards ............................................................................................................... 8 3.2 Test Verdict .................................................................................................................... 8 4 GENERAL TEST CONFIGURATIONS ........................................................................................ 9 4.1 Test Environments ......................................................................................................... 9 4.2 Test Equipment List ........................................................................................................ 9 4.3 Test Software List ........................................................................................................... 9 4.4 Measurement Uncertainty ............................................................................................ 10 4.5 Description of Test Setup ............................................................................................. 10 4.6 Measurement Results Explanation Example ................................................................ 13 5 TEST ITEMS .............................................................................................................................. 14 5.1 Antenna Requirements ................................................................................................. 14 5.2 Output Power ............................................................................................................... 15 5.3 Occupied Bandwidth .................................................................................................... 17 5.4 Conducted Spurious Emission ..................................................................................... 18 5.5 Band Edge (Authorized-band band-edge) .................................................................... 20 Report No.: BL-SZ2620002-601 Tel: +86-755-66850100 E-mail: [email protected] Page No. 3 / 62 Web: www.titcgroup.com Template No.: TRP-FCC Part 15.247 (2022-01-12) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 5.6 Conducted Emission .................................................................................................... 22 5.7 Radiated Spurious Emission ........................................................................................ 23 5.8 Band Edge (Restricted-band band-edge) ..................................................................... 28 5.9 Power Spectral density (PSD) ...................................................................................... 29 ANNEX A TEST RESULT ............................................................................................................. 30 A.1 Output Power ............................................................................................................... 30 A.2 Occupied Bandwidth .................................................................................................... 33 A.3 Conducted Spurious Emissions ................................................................................... 37 A.4 Band Edge (Authorized-band band-edge) .................................................................... 42 A.5 Conducted Emissions ................................................................................................... 45 A.6 Radiated Spurious Emission ..........................................................…

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