ChatField J28 Product Features

1. LoRa Mesh Off-Grid Communication

ChatField J28 supports LoRa Mesh communication. Multiple devices can form a local off-grid communication network, allowing teams to stay connected even without cellular service, Wi-Fi, or base stations.

2. Multi-Device Relay

Each ChatField device can act as a relay node.
When two devices are too far apart to communicate directly, messages can hop through nearby devices to extend the overall communication range.

3. More Devices, Wider Coverage

The ChatField Mesh network becomes stronger as more devices join.
More devices create more relay nodes, helping messages travel across a wider area.

4. 10km PTT Communication

J28 supports push-to-talk voice communication, similar to a traditional walkie-talkie.
Under open-field conditions, the communication range can be promoted as up to approximately 10km.

5. Mobile App Communication

Users can connect the device with the ChatField app to send text, voice, and location updates.
The mobile app provides a more intuitive interface, while the J28 handles off-grid wireless communication.

6. Text Messaging

Users can send text messages through the ChatField app when voice communication is not convenient.
This is useful for noisy environments, distributed teams, task updates, and status reports.

7. Voice Messaging

In addition to real-time PTT communication, J28 supports voice message transmission.
Users can send short voice updates for team members to receive and review.

8. Location Sharing

J28 supports team location sharing.
It is suitable for hiking, rescue, overlanding, farms, forests, mines, marine work, security patrols, and other field scenarios.

9. Built-in Multi-GNSS Positioning

J28 includes a built-in positioning module and supports multiple satellite positioning systems, including GPS, BeiDou, GLONASS, Galileo, and QZSS.
This gives the device stronger location capability in areas without cellular coverage.

10. 2.8-inch Touchscreen

J28 is equipped with a 2.8-inch IPS touchscreen.
Users can check communication status, basic information, channel content, and selected messages directly on the device.

11. Standalone Device Operation

J28 is not just a phone app accessory.
When using a smartphone is not convenient, the device itself can still support basic field operation.

12. App Mode + Device Mode

J28 supports two operation modes.
With a smartphone, users can access full app-based features.
Without a smartphone, users can still perform essential communication through the device.

13. Offline Map Support

J28 can work with the app for offline maps and location viewing.
When maps are prepared in advance, teams can view member locations, routes, meeting points, and task areas even without internet access.

14. SOS Emergency Communication

J28 can support emergency communication and team response in outdoor or field situations.
When a team member is lost, disconnected, or needs support, emergency messages and location updates can help the team respond faster.

15. FM Radio

J28 supports FM radio.
In outdoor, disaster, no-network, or emergency environments, FM radio can provide an additional way to receive public information.

16. Fast Charging

J28 supports fast charging for long outdoor missions, patrols, rescue operations, and remote work.
Battery capacity, standby time, and continuous operating time can be added once the final specifications are confirmed.

17. Multiple Carrying Options

J28 supports handheld use, back clip use, and lanyard carrying.
It is suitable for hiking, overlanding, security patrols, construction sites, mines, farms, forests, and marine operations.

18. Team Channel Communication

J28 is designed for multi-person team use.
Users can create different communication channels based on tasks, areas, or groups, such as rescue teams, vehicle teams, base camp, patrol teams, and logistics teams.

19. No Cell Service Required

The core value of ChatField J28 is that teams can communicate through the LoRa Mesh network even when there is no cellular service.
It is designed for local team communication beyond carrier network coverage.

20. No Monthly Subscription Required

J28’s local LoRa Mesh communication does not depend on cellular networks or satellite subscription plans.
Compared with satellite communication devices, it is more suitable for local teams, regional operations, and field coordination.

21. Suitable for B2B Distribution

J28 is suitable for two-way radio distributors, outdoor equipment channels, GPS device sellers, emergency equipment suppliers, security equipment channels, and industrial equipment distributors.

22. OEM / ODM Support

ChatField can support OEM / ODM cooperation for distributors, brands, and project-based customers.
It is suitable for private labeling, channel distribution, sample testing, and project procurement.

Short Website Summary

ChatField J28 is a smart PTT communication device designed for teams working beyond cellular coverage. It combines LoRa Mesh networking, 10km PTT communication, mobile app messaging, standalone device operation, built-in multi-GNSS positioning, text and voice messaging, and location sharing. It helps teams stay connected even without cellular service, Wi-Fi, or base stations.