1. FCC ID
  2. 2AF3K
  3. 2AF3K-BK003

FCC ID 2AF3K-BK003

Block Bitkey

by Block, Inc.

Grantee Code: 2AF3K   Product Code: BK003
Latest application date: 2026-03-25

FCC ID Device Details

FCC ID2AF3K-BK003
Mirrorsfcc.id | gov | fccid.ai
Grantee Code2AF3K
Product CodeBK003
Applicant BusinessBlock, Inc. 🇺🇸
Related Domains squareup.com
Equipment ClassBlock Bitkey
Test FirmNebraska Center for Excellence in Electronics

Operating Frequencies

Frequency RangeApplication PurposeFinal Action Date
13.56 MHzOriginal Equipment2026-03-25

Exhibits

DocumentTypeAvailableFile
Label InformationID Label/Location Info2026-03-25PDF 109.9 KB
Test ReportTest Report2026-03-25PDF 982.4 KB
Att Statements 2.911(d)(5)(7)Attestation Statements2026-03-25PDF 1 MB
Att Statements 2.911(d)(5)(i)Attestation Statements2026-03-25PDF 1.1 MB
Att Statements 2.911(d)(5)(ii)Attestation Statements2026-03-25PDF 1 MB
Authorization LetterCover Letter(s)2026-03-25PDF 926.7 KB
Confidentiality LetterCover Letter(s)2026-03-25PDF 222 KB
LOACover Letter(s)2026-03-25PDF 1 MB
RF ExposureRF Exposure Info2026-03-25PDF 631.1 KB
User Guide Metadata onlyUsers Manual2026-09-21PDF 3.6 MB
Internal Photos Metadata onlyInternal Photos2026-09-21PDF 864 KB
External Photos Metadata onlyExternal Photos2026-09-21PDF 641.9 KB
TSUP Metadata onlyTest Setup Photos2026-09-21PDF 684.2 KB
Block Diagram Metadata onlyBlock DiagramPDF 40 KB
Schematics Metadata onlySchematicsPDF 3.3 MB
Operational Description Metadata onlyOperational DescriptionPDF 182.6 KB

Application Information

Application IDXWec9vR/NbIVaKtnhwNAkw==
Final Action Date2026-03-25
Application PurposeOriginal Equipment
Applicant FRN0024921181
ModelBK003
Frequency Range13.56 MHz
Equipment ClassDXX - Part 15 Low Power Communication Device Transmitter
Device DescriptionBlock Bitkey
Responsible PartyGavin Demonte, gavin@squareup.com , 415-375-3176
Non-Technical ContactYuchan Lu, Block, Inc., yuchan@squareup.com , 415-375-3176
Test FirmKarthik Vepuri, Nebraska Center for Excellence in Electronics, kVepuri@nceelabs.com , 4023236233
TCB Emailtei@timcoengr.com
TCB ScopeA1: Low Power Transmitters below 1 GHz (except Spread Spectrum), Unintentional Radiators, EAS (Part 11) & Consumer ISM devices
Short-Term ConfidentialityYes
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
XWec9vR/NbIVaKtnhwNAkw==2026-03-25Original Equipment

Equipment Authorization

FrequencyRules
13.56 MHz15C

Grants

TCB Grant - Application XWec9vR/NbIVaKtnhwNAkw==

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

  IIA Lab Services, LLC
13146 NW 86th Drive Suite 400
Alachua, FL 32615
Date of Grant: 03/25/2026

Application Dated: 03/16/2026
Block, Inc.
1955 Broadway,
Suite 600
Oakland, CA 94612
 
Attention: Gavin Demonte ,

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:  2AF3K-BK003
Name of Grantee:  Block, Inc.
Equipment Class: Part 15 Low Power Communication Device Transmitter
Notes: Block Bitkey
Grant Notes  FCC Rule Parts Frequency
Range (MHZ) 		Output
Watts 		Frequency
Tolerance 		Emission
Designator
15C 13.56  -  13.56  

This device must not be co-located or operating in conjunction with any other antenna or transmitter, except in accordance with FCC multi-transmitter product procedures, or as evaluated in this filing. Device meets SAR Exemption for Portable use.