1. FCC ID
  2. P4U
  3. P4U-MOD257

FCC ID P4U-MOD257

RADIO TRANSCEIVER

by Kar-Tech, Inc.

Grantee Code: P4U   Product Code: MOD257
Latest application date: 2026-07-27

FCC ID Device Details

FCC IDP4U-MOD257
Mirrorsfcc.id | gov | fccid.ai
Grantee CodeP4U
Product CodeMOD257
Applicant BusinessKar-Tech, Inc. 🇺🇸
Related Domains kar-tech.com
Equipment ClassRADIO TRANSCEIVER
Test FirmEMTEK (NINGBO) Co., Ltd.

Operating Frequencies

Frequency RangeApplication PurposeFinal Action Date
902.5-927 MHzClass II permissive change or modification of presently authorized equipment2026-07-27
902.5-927 MHzOriginal Equipment2026-06-14

Exhibits

DocumentTypeAvailableFile
User Manual part1-3Users Manual2026-07-27PDF 801.2 KB
User Manual part2-3Users Manual2026-07-27PDF 2 MB
User ManualUsers Manual2026-06-14PDF 1.8 MB
Internal PhotosInternal Photos2026-07-27PDF 1.2 MB
Internal PhotosInternal Photos2026-06-14PDF 440.6 KB
External PhotosExternal Photos2026-07-27PDF 833.5 KB
External PhotosExternal Photos2026-06-14PDF 459 KB
LabelID Label/Location Info2026-07-27PDF 878.7 KB
Label LocationID Label/Location Info2026-06-14PDF 1.5 MB
AA photoTest Setup Photos2026-07-27PDF 144.7 KB
AO Test Setup PhotosTest Setup Photos2026-07-27PDF 153.8 KB
Test Setup PhotosTest Setup Photos2026-07-27PDF 466.1 KB
Test Setup PhotosTest Setup Photos2026-06-14PDF 116.8 KB
Antenna test reportTest Report2026-07-27PDF 1.1 MB
Test ReportTest Report2026-07-27PDF 776 KB
Test Report SARRF Exposure Info2026-07-27PDF 1.4 MB
Test Report SAR Appendix A-1RF Exposure Info2026-07-27PDF 120.7 KB
Test Report SAR Appendix B-1RF Exposure Info2026-07-27PDF 121.8 KB
Test Report SAR Appendix C-1RF Exposure Info2026-07-27PDF 2 MB
Test Report SAR Appendix C-2RF Exposure Info2026-07-27PDF 2 MB
Test Report SAR Appendix D-1RF Exposure Info2026-07-27PDF 719.9 KB
Antenna SpecificationTest Report2026-06-14PDF 991.1 KB
Test ReportTest Report2026-06-14PDF 3.4 MB
Attestation Statements Part 2.911 i iiAttestation Statements2026-07-27PDF 82.4 KB
Attestation Statements US agent for service of processAttestation Statements2026-07-27PDF 93.8 KB
Attestation Statements part 2.911 d 5 i and d 5 iiAttestation Statements2026-06-14PDF 86.9 KB
US Agent LetterAttestation Statements2026-06-14PDF 84.1 KB
C2PC letterCover Letter(s)2026-07-27PDF 118 KB
Confidentiality LetterCover Letter(s)2026-07-27PDF 179.8 KB
POACover Letter(s)2026-07-27PDF 52.5 KB
Authority LetterCover Letter(s)2026-06-14PDF 73.9 KB
Confidentiality LetterCover Letter(s)2026-06-14PDF 183.8 KB
Modular Approval LetterCover Letter(s)2026-06-14PDF 169.3 KB
RF ExposureRF Exposure Info2026-06-14PDF 67.4 KB
Block Diagram Metadata onlyBlock DiagramPDF 229 KB
Schematics Metadata onlySchematicsPDF 193.5 KB
Operation Description Metadata onlyOperational DescriptionPDF 233.6 KB

Application Information

Application IDTVhbgNyb3Q38/U6wrAM2NA==
Final Action Date2026-07-27
Application PurposeClass II permissive change or modification of presently authorized equipment
ModelMOD257
Frequency Range902.5-927 MHz
Equipment ClassDSS - Part 15 Spread Spectrum Transmitter
Device DescriptionRADIO TRANSCEIVER
Responsible PartyHassan Karbassi, Hassan@kar-tech.com , (414) 646-9444
Non-Technical ContactHassan Karbassi, KAR-TECH INC., Hassan@kar-tech.com , (414) 646-9444
Test FirmTony Wei, EMTEK (NINGBO) Co., Ltd., basiv@emtek.com.cn , 0086-574-27907998
TCB EmailCB@industrial-ia.com
TCB ScopeA4: UNII devices & low power transmitters using spread spectrum techniques
Short-Term ConfidentialityYes
Long-Term ConfidentialityYes
Modular EquipmentSingle Modular Approval
Composite DeviceNo
Cognitive RadioNo
Authorization WaiverNo
Authorization Waiver ApprovedNo
Section 5301 CertificationYes
Related OET Knowledge DataBase InquiryNo

Applications

Application IDDatePurpose
TVhbgNyb3Q38/U6wrAM2NA==2026-07-27Class II permissive change or modification of presently authorized equipment
rwHJpQlM18N9BzDHEuJcAg==2026-06-14Original Equipment

Equipment Authorization

FrequencyOutputRules
902.5-927 MHz0.7063215C
902.5-927 MHz0.7585815C

Grants

TCB Grant - Application TVhbgNyb3Q38/U6wrAM2NA==

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: 07/27/2026

Application Dated: 07/27/2026
Kar-Tech, Inc.
111 Enterprise Road
Delafield, WI 53018
 
Attention: Hassan Karbassi , President

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:  P4U-MOD257
Name of Grantee:  Kar-Tech, Inc.
Equipment Class: Part 15 Spread Spectrum Transmitter
Notes: RADIO TRANSCEIVER
Modular Type: Single Modular
Grant Notes  FCC Rule Parts Frequency
Range (MHZ) 		Output
Watts 		Frequency
Tolerance 		Emission
Designator
15C 902.5  -  927.0 0.70632  

Single module approval. Output Power listed is the maximum conducted output power. This device must be installed and operated so as to provide a 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, or as evaluated in this filing.

Class II Permissive Change: Authorizes integration into the Kar-Tech Wireless E-Stop system, model HJH106C. The highest reported SAR for body and product-specific (10g extremity SAR) exposure conditions are 1.56 W/kg and 1.24 W/kg, respectively.


TCB Grant - Application rwHJpQlM18N9BzDHEuJcAg==

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: 06/14/2026

Application Dated: 06/15/2026
Kar-Tech, Inc.
111 Enterprise Road
Delafield, WI 53018
 
Attention: Hassan Karbassi , President

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:  P4U-MOD257
Name of Grantee:  Kar-Tech, Inc.
Equipment Class: Part 15 Spread Spectrum Transmitter
Notes: RADIO TRANSCEIVER
Modular Type: Single Modular
Grant Notes  FCC Rule Parts Frequency
Range (MHZ) 		Output
Watts 		Frequency
Tolerance 		Emission
Designator
15C 902.5  -  927.0 0.75858  

Output Power listed is the maximum conducted output power. This device must be installed and operated so as to provide a 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, or as evaluated in this filing.