1. FCC ID
  2. 2BFFW
  3. 2BFFW-TWST75

FCC ID 2BFFW-TWST75

Wearing wireless headphones

by Shenzhen Yinzhihang Technology Co., Ltd.

Grantee Code: 2BFFW   Product Code: TWST75
Latest application date: 2026-01-26

FCC ID Device Details

FCC ID2BFFW-TWST75
Mirrorsfcc.id | gov | fccid.ai
Grantee Code2BFFW
Product CodeTWST75
Applicant BusinessShenzhen Yinzhihang Technology Co., Ltd. 🇨🇳
Related Domains miramontsolutions.com
Equipment ClassWearing wireless headphones
Test FirmGuangdong DN Testing Co., Ltd.

Operating Frequencies

Frequency RangeApplication PurposeFinal Action Date
2402-2480 MHzOriginal Equipment2026-01-26
2402-2480 MHzOriginal Equipment2025-02-20

Exhibits

DocumentTypeAvailableFile
User manualUsers Manual2026-01-26PDF 4.5 MB
User manualUsers Manual2025-02-20PDF 4.3 MB
Internal PhotosInternal Photos2026-01-26PDF 730.8 KB
Internal photosInternal Photos2025-02-20PDF 1.4 MB
External PhotosExternal Photos2026-01-26PDF 642.5 KB
External photosExternal Photos2025-02-20PDF 821.2 KB
LabelID Label/Location Info2026-01-26PDF 56.8 KB
ID label and locationID Label/Location Info2025-02-20PDF 90.4 KB
Test Setup PhotoTest Setup Photos2026-01-26PDF 602.3 KB
Test photoTest Setup Photos2025-02-20PDF 334.8 KB
Antenna ReportTest Report2026-01-26PDF 255 KB
Test Report BT_Part 1Test Report2026-01-26PDF 5.9 MB
Test Report BT_Part 2Test Report2026-01-26PDF 5.8 MB
Test Report BT_Part 3Test Report2026-01-26PDF 5.9 MB
Test Report BT_Part 4Test Report2026-01-26PDF 2.6 MB
Antenna SpecificationTest Report2025-02-20PDF 385.2 KB
Test reportTest Report2025-02-20PDF 1.4 MB
Attestation Statement-KasperskyAttestation Statements2026-01-26PDF 132.5 KB
Attestation Statements-Not CoveredAttestation Statements2026-01-26PDF 81.2 KB
US AgentAttestation Statements2026-01-26PDF 428 KB
Attestation_StatementAttestation Statements2025-02-20PDF 111.1 KB
US_AgentAttestation Statements2025-02-20PDF 59.7 KB
Confidentiality RequestCover Letter(s)2026-01-26PDF 74.7 KB
POACover Letter(s)2026-01-26PDF 73.2 KB
ConfidentialityCover Letter(s)2025-02-20PDF 108.2 KB
Letter AuthorizationCover Letter(s)2025-02-20PDF 76.5 KB
RF ExposureRF Exposure Info2026-01-26PDF 346.6 KB
MPERF Exposure Info2025-02-20PDF 67.1 KB
Block Diagram Metadata onlyBlock DiagramPDF 56.9 KB
Block Diagram Metadata onlyBlock DiagramPDF 18 KB
Schematic Diagram Metadata onlySchematicsPDF 397.6 KB
Schematics Metadata onlySchematicsPDF 186.5 KB
Operation Description Metadata onlyOperational DescriptionPDF 91.7 KB
Operational Description Metadata onlyOperational DescriptionPDF 21.7 KB
Parts List Metadata onlyParts List/Tune Up InfoPDF 43.8 KB

Application Information

Application IDwrloPEiMfRqONupbgJkndQ==
Final Action Date2026-01-26
Application PurposeOriginal Equipment
Applicant FRN0035127240
ModelTWST75
Frequency Range2402-2480 MHz
Equipment ClassDSS - Part 15 Spread Spectrum Transmitter
Device DescriptionWearing wireless headphones
Responsible Partyjack bu, 986250419@qq.com , 18906679427
Non-Technical ContactWenyi Wang, MIRAMONT SOLUTIONS LLC, wenyiwang@miramontsolutions.com , 9514013633
Test FirmJoise Yang, Guangdong DN Testing Co., Ltd., Joise.yang@dn-testing.com , +86-0769-8808 7383
TCB Emailjoe_chew@derycom-us.com
TCB ScopeA4: UNII devices & low power transmitters using spread spectrum techniques
Short-Term ConfidentialityNo
Long-Term ConfidentialityYes
Modular EquipmentDoes not apply
Composite DeviceNo
Cognitive RadioNo
Authorization WaiverNo
Authorization Waiver ApprovedNo
Section 5301 CertificationYes
Related OET Knowledge DataBase InquiryNo

Applications

Application IDDatePurpose
wrloPEiMfRqONupbgJkndQ==2026-01-26Original Equipment
AJMQT4wTg0NcPZnB5HSw6A==2025-02-20Original Equipment

Equipment Authorization

Frequency
2402-2480 MHz

Grants

TCB Grant - Application wrloPEiMfRqONupbgJkndQ==

TCB GRANT OF EQUIPMENT
AUTHORIZATION		 TCB
Certification
Issued Under the Authority of the
Federal Communications Commission
By:

  DERYCOM CERTIFICATION SERVICES, INC.
1100 Falcon Avenue
Glencoe, MN 55336
Date of Grant: 01/26/2026

Application Dated: 01/26/2026
Shenzhen Yinzhihang Technology Co., Ltd.
203, 2nd Floor, Building 2, Guanghui Science
and Technology Park, Minqing Road,
Longhua Street, Longhua District, Shenzhen,
China
 
Attention: jack bu ,

NOT TRANSFERABLE
EQUIPMENT AUTHORIZATION is hereby issued to the named GRANTEE, and is VALID ONLY for the equipment identified hereon for use under the Commission's Rules and Regulations listed below.
 
FCC IDENTIFIER:  2BFFW-TWST75
Name of Grantee:  Shenzhen Yinzhihang Technology Co., Ltd.
Equipment Class: Part 15 Spread Spectrum Transmitter
Notes: Wearing wireless headphones
Grant Notes  FCC Rule Parts Frequency
Range (MHZ) 		Output
Watts 		Frequency
Tolerance 		Emission
Designator
15C 2402.0  -  2480.0 0.00186  

Output power listed is conducted power.

TCB Grant - Application AJMQT4wTg0NcPZnB5HSw6A==

TCB GRANT OF EQUIPMENT
AUTHORIZATION		 TCB
Certification
Issued Under the Authority of the
Federal Communications Commission
By:

  LGAI Technological Center S.A. (APPLUS)
Ronda de la Font del Carme, s/n <BR>P.O. Box 08193,
Barcelona,
Spain 		Date of Grant: 02/20/2025

Application Dated: 02/20/2025
Shenzhen Yinzhihang Technology Co., Ltd.
203, 2nd Floor, Building 2, Guanghui Science
and Technology Park, Minqing Road,
Longhua Street, Longhua District, Shenzhen,
China
 
Attention: jack bu ,

NOT TRANSFERABLE
EQUIPMENT AUTHORIZATION is hereby issued to the named GRANTEE, and is VALID ONLY for the equipment identified hereon for use under the Commission's Rules and Regulations listed below.
 
FCC IDENTIFIER:  2BFFW-TWS-T75
Name of Grantee:  Shenzhen Yinzhihang Technology Co., Ltd.
Equipment Class: Part 15 Low Power Communication Device Transmitter
Notes: wireless earphones
Grant Notes  FCC Rule Parts Frequency
Range (MHZ) 		Output
Watts 		Frequency
Tolerance 		Emission
Designator
15C 2402.0  -  2480.0