Image: Rotor Riot
Components · Radio Receivers
DBR4 Dual Band Xross Gemini Receiver for ELRS Protocol
MFR RadioMasterMODEL RR2143
DBR4 Dual Band Xross Gemini Receiver for ELRS Protocol — radio receivers by RadioMaster.
Vendor-supplied listing. This part is made by RadioMaster and listed from Rotor Riot. Full specifications and current availability are held by the manufacturer; this listing carries the part, its price and its category.
No second supplier matched for this listing — Rotor Riot is the only route we can offer today. 6 of our suppliers carry RadioMaster, though, so it may be listed elsewhere under a different product name: GetFPV, NewBeeDrone, Pyrodrone, RaceDayQuads, ReadyMadeRC.
Rotor Riot: usually ships same day. Its shipping policy says: “Orders for in-stock items, placed before 2 PM EST, Mondays through Fridays, are typically fulfilled the same day.” Policy, read 8 Oct 2026. That is the supplier’s dispatch time, not a delivery date; carrier transit is extra.
Specifications· 8 fields
As published by RadioMaster, the manufacturer. View the manufacturer's page
- Antenna
- 2 x 2.4GHz wires & 2 x 900MHz wires
- RF chip
- Semtech LR1121 x 2
- Processor
- ESP32
- Dimensions
- 27.20 *27.20mm
- Bus interface
- CRSF
- Frequency range
- 2.404 - 2.479 GHz / 903.5 - 926.9 MHz
- Telemetry power
- Max 100mW
- Operating voltage
- DC 4.5 - 8.4V