DJI O4 Relay Module (T100, T70P, T25P)

DJI O4 Relay Module (AGRAS T100, T70P, T25P)

DJI O4 Relay Module is a field-ready signal relay designed to keep your DJI O4 link stable when line of sight is compromised by tall crops, trees, rolling terrain, and farm infrastructure. DJI originally introduced the Relay concept to reduce lag and signal loss risk in challenging agricultural environments. For AGRAS operations where every pass matters, the O4 Relay acts as a midpoint between the remote controller and the aircraft, helping maintain a reliable connection across larger blocks and more complex terrain.

Why operators add an O4 Relay to their kit

• More consistent connectivity in obstructed or uneven terrain, especially around tree lines and orchard rows.
• Long-range effective link rated up to 8 km (FCC), 5 km (SRRC), or 4 km (MIC/KCC/CE) in unobstructed, interference-free conditions at a 2.5 m flight altitude.
• Multi-band operation, supports 2.4 GHz, 5.1 GHz, 5.8 GHz, note that 5.8 GHz may be unavailable in some regions, follow local regulations.
• Built-in battery power, Li-ion 6500 mAh, with 10 W power consumption for practical field deployment.

Compatibility

• DJI AGRAS T100, DJI provides the DJI O4 Relay user guide under T100 downloads.
• DJI AGRAS T70P, DJI provides the DJI O4 Relay user guide under T70P downloads.
• DJI AGRAS T25P, DJI lists O4 Relay (optional) on the T25P product page. If the app reports a model mismatch during pairing, the user guide indicates you can connect the relay to the remote controller USB-C and switch to the corresponding model in the app, then retry.