RadioMaster R81 V2 8-Channel 2.4GHz SBUS Nano Receiver

The RadioMaster R81 V2 is a 2 g, 8-channel nano receiver for micro drones, whoops, and lightweight toothpick builds. Delivering an SBUS output and over 1 km of control range, it supports FrSky D8, FrSky D16, and Futaba SFHSS protocols. This receiver is designed for multi-protocol module (MPM) radios and will not bind to native FrSky transmitters.

Key features

• Injects RSSI telemetry directly onto channel 9 of the SBUS output stream

• Will not bind to native FrSky transmitters (requires an MPM controller for FrSky modes)

• Operates on a 4.5 to 6V input range, powered directly from a flight controller BEC

• Provides up to 1 km of operating range via a single 60 mm wire antenna

Specifications

• Channels: 8

• Frequency: 2.4GHz (2400-2483.5 MHz)

• Supported protocols: FrSky D8, FrSky D16, Futaba SFHSS

• Output format: SBUS (RSSI on CH9)

• Operating voltage: 4.5-6V

• Antenna length: 60 mm

• Dimensions: 17 x 11 mm

• Weight: 2 g

Before purchasing, confirm that your transmitter features a multi-protocol module (MPM) if you plan to use FrSky protocols, as the R81 V2 will not bind to standalone FrSky radios. It suits micro and toothpick flight controllers requiring a standard SBUS control link. Verify that your flight controller's BEC provides a compatible 4.5 to 6V supply to the receiver pad to prevent overvolting the unit.