1. FCC ID
  2. 2AREB
  3. 2AREB-BF22

FCC ID 2AREB-BF22

ButterFly SE

by TWELVE SOUTH, LLC

Grantee Code: 2AREB   Product Code: BF22
Latest application date: 2026-03-30

FCC ID Device Details

FCC ID2AREB-BF22
Mirrorsfcc.id | gov | fccid.ai
Grantee Code2AREB
Product CodeBF22
Applicant BusinessTWELVE SOUTH, LLC 🇺🇲
Related Domains twelvesouth.com
Equipment ClassButterFly SE
Test FirmShenzhen Microtest Co., Ltd.

Operating Frequencies

Frequency RangeApplication PurposeFinal Action Date
1.778 MHzOriginal Equipment2026-03-30
0.36 MHzOriginal Equipment2026-03-30

Exhibits

DocumentTypeAvailableFile
User manualUsers Manual2026-03-30PDF 471.8 KB
User manual ComplianceUsers Manual2026-03-30PDF 3.5 MB
Internal photosInternal Photos2026-03-30PDF 3 MB
External photosExternal Photos2026-03-30PDF 2.1 MB
ID label and locationID Label/Location Info2026-03-30PDF 3 MB
Test Setup photoTest Setup Photos2026-03-30PDF 937.1 KB
Coil Specification PhoneTest Report2026-03-30PDF 366.3 KB
Coil Specification watchTest Report2026-03-30PDF 1,019.1 KB
Test reportTest Report2026-03-30PDF 1.9 MB
Attestation StatementAttestation Statements2026-03-30PDF 448.8 KB
Kaspersky StatementAttestation Statements2026-03-30PDF 690.6 KB
TCB_validation_US_agent_processAttestation Statements2026-03-30PDF 1.1 MB
Us_AgentAttestation Statements2026-03-30PDF 195.9 KB
ConfidentialityCover Letter(s)2026-03-30PDF 493.6 KB
Letter AuthorizationCover Letter(s)2026-03-30PDF 228.3 KB
MPERF Exposure Info2026-03-30PDF 452.7 KB
Block Diagram Metadata onlyBlock DiagramPDF 159.4 KB
Schematics Metadata onlySchematicsPDF 1.2 MB
Operational Description Metadata onlyOperational DescriptionPDF 229.5 KB

Application Information

Application IDy+AFOmSxks9VtwQoDxCBdQ==
Final Action Date2026-03-30
Application PurposeOriginal Equipment
Applicant FRN0027881002
ModelBF22
Frequency Range1.778 MHz
Equipment ClassDXX - Part 15 Low Power Communication Device Transmitter
Device DescriptionButterFly SE
Responsible PartyAndrew Green, Andrew.Green@twelvesouth.com , 843-849-1212
Technical ContactLeon Chen, Shenzhen Microtest Co., Ltd, leon@51mti.com , +86-755 88850135
Non-Technical ContactAndrew Green, Twelve South, LLC, Andrew.Green@twelvesouth.com , 843-849-1212
Test FirmTina Huang, Shenzhen Microtest Co., Ltd., tinahuang@51mti.com , 0755-88850135-1132
TCB Emailelabscert@applus.com
TCB ScopeA1: Low Power Transmitters below 1 GHz (except Spread Spectrum), Unintentional Radiators, EAS (Part 11) & Consumer ISM devices
Short-Term ConfidentialityNo
Long-Term ConfidentialityYes
Modular EquipmentDoes not apply
Composite DeviceYes
Cognitive RadioNo
Authorization WaiverNo
Authorization Waiver ApprovedNo
Section 5301 CertificationYes
Related OET Knowledge DataBase InquiryNo

Applications

Application IDDatePurpose
y+AFOmSxks9VtwQoDxCBdQ==2026-03-30Original Equipment
5/YTG4lLSpWO1duJfOgZtQ==2026-03-30Original Equipment

Equipment Authorization

FrequencyRulesGrant Notes
1.778 MHz15CCC
0.115-0.205 MHz15CCC
0.36 MHz15CCC
0.327 MHz15CCC

Grants

TCB Grant - Application y+AFOmSxks9VtwQoDxCBdQ==

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: 03/30/2026

Application Dated: 03/30/2026
TWELVE SOUTH, LLC
1503 KING ST STE201 Charleston, SC29405, USA
Charleston,
USA Minor Outlying Islands
 
Attention: Andrew Green ,

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:  2AREB-BF22
Name of Grantee:  TWELVE SOUTH, LLC
Equipment Class: Part 15 Low Power Communication Device Transmitter
Notes: ButterFly SE
Grant Notes  FCC Rule Parts Frequency
Range (MHZ) 		Output
Watts 		Frequency
Tolerance 		Emission
Designator
CC 15C 1.778  -  1.778  

The antennas used with this transmitter must be installed to provide a minimum separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter, except in accordance with FCC multi- transmitter product procedures. End-users must be provided with operating procedures for satisfying RF exposure compliance.

CC: This device is certified pursuant to two different Part 15 rules sections.

TCB Grant - Application 5/YTG4lLSpWO1duJfOgZtQ==

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: 03/30/2026

Application Dated: 03/30/2026
TWELVE SOUTH, LLC
1503 KING ST STE201 Charleston, SC29405, USA
Charleston,
USA Minor Outlying Islands
 
Attention: Andrew Green ,

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:  2AREB-BF22
Name of Grantee:  TWELVE SOUTH, LLC
Equipment Class: Part 15 Low Power Transmitter Below 1705 kHz
Notes: ButterFly SE
Grant Notes  FCC Rule Parts Frequency
Range (MHZ) 		Output
Watts 		Frequency
Tolerance 		Emission
Designator
CC 15C 0.115  -  0.205  
CC 15C 0.36  -  0.36  
CC 15C 0.3265  -  0.3265  

The antennas used with this transmitter must be installed to provide a minimum separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter, except in accordance with FCC multi- transmitter product procedures. End-users must be provided with operating procedures for satisfying RF exposure compliance.

CC: This device is certified pursuant to two different Part 15 rules sections.