Radio and authorization data
Model, FCC ID, tested frequency ranges, radio technology, modulation, channel count and test-result status are taken from the FCC files.
CHATFIELD J25 · FCC ID 2BVP9-J25
J25 phone-paired LoRa mesh communication device.
J25 pairs with a smartphone over Bluetooth Low Energy and connects equipped teammates through a local LoRa radio network. The U.S. radio values on this page are taken from the J25 FCC Grant and FCC test reports; commercial configuration details remain quotation-controlled.
MODELJ25
Equipment name in the FCC file: Smart All-Area Intercom.
U.S. AUTHORIZATIONFCC ID 2BVP9-J25
Grant issued to Jingxi Box (Shenzhen) Intelligent Technology Co., Ltd.
FCC-TESTED RADIOLoRa + Bluetooth LE
LoRa 903-927.5 MHz and Bluetooth LE 2402-2480 MHz in the tested U.S. configuration.
HOW TO READ THIS PAGE
Specifications separated by evidence type.
Procurement teams should not treat every product statement as a certification result. This page separates laboratory-tested radio data, product workflow descriptions and order-specific commercial details.
How the product is used
Phone pairing, PTT, messages, team location, offline maps and local SOS describe the product workflow; FCC testing does not certify application functionality.
What must match the quotation
Battery capacity, dimensions, range statement, accessories, packaging, app version and destination-market configuration require version confirmation before ordering.
FCC-TESTED J25 RADIO DATA
Published U.S. certification specifications
The following values are transcribed as searchable webpage text from the J25 FCC Grant of Equipment Authorization and supporting FCC test reports.
| Item | Published value | Evidence |
|---|---|---|
| Equipment name | Smart All-Area Intercom | FCC Grant and test reports |
| Model number | J25 | FCC Grant and test reports |
| FCC identifier | 2BVP9-J25 | FCC Grant of Equipment Authorization |
| Grantee / applicant | Jingxi Box (Shenzhen) Intelligent Technology Co., Ltd. | FCC Grant and test reports |
| FCC rule part | FCC Part 15C | FCC Grant; FCC Part 15 Subpart C test reports |
| LoRa radio technology | LoRa | Report psi2603196-C01-R02 |
| LoRa tested operating frequency | 903 MHz to 927.5 MHz | FCC Grant and LoRa test report |
| LoRa modulation | LoRa Chirp Spread Spectrum | Report psi2603196-C01-R02 |
| LoRa channel count | 16 channels | Report psi2603196-C01-R02 |
| Bluetooth radio technology | Bluetooth V5.0 Low Energy | Report psi2603196-C01-R01 |
| Bluetooth tested operating frequency | 2402 MHz to 2480 MHz | FCC Grant and Bluetooth LE test report |
| Bluetooth channel count | 40 channels | Report psi2603196-C01-R01 |
| Bluetooth modulation | GFSK | Report psi2603196-C01-R01 |
| Tested power supply conditions | DC 5 V from adapter; DC 3.7 V from battery | FCC LoRa and Bluetooth LE test reports |
| FCC laboratory result | PASS for the applicable reported FCC Part 15C test items | Reports psi2603196-C01-R01 and psi2603196-C01-R02 |
| Grant date | June 4, 2026 | FCC Grant of Equipment Authorization |
U.S. configuration only: The frequency values above describe the configuration evaluated in the cited FCC files. They are not a statement that the same frequency plan is permitted in every country. Destination-market radio configuration and documents must be confirmed before ordering.
SYSTEM RELATIONSHIP
Phone interface → Bluetooth LE → J25 → LoRa network
This is the practical role of the two FCC-tested radio systems. Bluetooth LE links the nearby phone and J25; LoRa carries local communication between equipped J25 devices.
- 1 · USER INTERFACEPaired phone
The team member uses the phone for the ChatField application, maps and communication controls.
- 2 · LOCAL PAIRINGBluetooth LE
The phone and its J25 exchange operational data over the short local pairing link.
- 3 · FIELD RADIOJ25 LoRa link
J25 sends data to another equipped device directly or through a supported participating-node path.
- 4 · TEAM DELIVERYReceiving phone
The destination J25 passes the received information to its paired phone for the teammate.
PRODUCT WORKFLOW · NOT FCC PERFORMANCE CLAIMS
What buyers are evaluating J25 to do.
These functions describe the intended phone-paired LoRa mesh communication workflow. They should be demonstrated with sample units under the buyer’s real operating conditions.
Local push-to-talk
Start PTT from the paired phone and exchange voice information with equipped teammates.
Text and voice messages
Send concise operational information that team members can review again.
Reported positions
Exchange local position information between participating teammates.
Prepared map data
Use map data prepared on the phone before leaving normal network coverage.
Team alert
Send an alert to equipped teammates on the local network; this is not public emergency dispatch.
Local multi-node path
Plan and field-test participating devices around the actual team route and terrain.
FIELD RANGE · NOT AN FCC CERTIFICATION VALUE
Use distance figures with their test conditions.
FCC radio reports establish the cited authorization and laboratory radio data. Communication distance is a field result that changes with terrain, structures, vegetation, interference, antenna position, carrying position and node layout.
Up to 10 km
Use this figure only for ideal open terrain such as plains, open line-of-sight routes or areas with limited hills.
Around 5 km
ChatField has tested around 5 km in urban conditions with high-rise buildings and structural obstructions.
Up to two relay nodes
Where the configured network and team layout permit it, up to two participating J25 relay nodes may be evaluated on the real route.
Procurement rule: reproduce the intended route with the approved sample configuration before using any range figure as an acceptance requirement.
BUYER DOCUMENTS
Continue from specification to evidence.
The product introduction and compliance center are kept beside the specification summary so technical and procurement teams can follow the same review path.
ChatField public product PDF
Use the revised English overview with phone-paired workflow pages and an FCC-aligned radio specification page. Commercial parameters still require version confirmation.
Download FCC-aligned PDF ↗FCC ID and controlled reports
Review FCC ID 2BVP9-J25 and request the applicable Grant, LoRa, Bluetooth LE, RF exposure, wireless-power and SDoC files.
Open compliance center →Match documents to the order
Provide the destination country, intended use, sample quantity and expected order quantity so the response matches the proposed configuration.
Request documents and quotation →PROJECT-CONTROLLED SPECIFICATIONS
Confirm these items before sample approval.
FCC testing verifies the cited radio compliance data; it does not freeze every commercial version detail. The following items must be confirmed against the current quotation and sample.
Battery and charging configuration
Confirm the exact capacity, charging input and supplied accessories for the quoted version.
Dimensions, enclosure and carrying method
Confirm the production sample, mounting accessories and packaging configuration.
Range and mesh acceptance criteria
Define the real terrain, route, obstruction, team spacing and pass/fail test method.
Destination-market radio plan
Confirm permitted frequencies, firmware configuration and the required market document set.
Phone and app compatibility
Confirm the supported phone platform, app version, language and required workflow.
Included documents and labeling
Align manuals, labels, packaging, certification evidence and OEM/ODM requirements with the order.
PROCUREMENT QUESTIONS
J25 specification questions, answered.
Which J25 parameters on this page come from FCC files?
The model, FCC ID, grantee, FCC rule part, LoRa and Bluetooth radio technologies, tested frequency ranges, modulation types, channel counts, tested power-supply conditions and laboratory result are taken from the cited FCC Grant and test reports.
Does FCC testing verify PTT, messaging, maps and team-location functions?
No. FCC radio testing supports the cited authorization and emissions/compliance evidence. Product functions must be demonstrated with the applicable app, firmware and sample configuration.
Are 903-927.5 MHz LoRa frequencies intended for every market?
No. That range is the U.S. configuration described in the cited FCC files. Each destination market requires its own permitted configuration and document review.
Why are battery capacity and a single range figure not listed as FCC-certified values?
Those are commercial product-version and field-performance details, not values established by the FCC radio reports. They must be confirmed against the quotation, sample and field-test conditions.
What should a buyer send when requesting the current specification package?
Send the destination country, application, team size, route and terrain, required functions, sample quantity, expected order quantity and document requirements.
TECHNICAL + COMMERCIAL REVIEW
Need the FCC files, current J25 configuration or sample plan?
Send the destination country, application, team size and estimated quantity. We will match the document set to the proposed configuration.
Request J25 information