RadioMaster ER8 2.4GHz 8CH ELRS PWM Receiver

The RadioMaster ER8 is an 8-channel PWM receiver built on the 2.4GHz ExpressLRS system. It is specifically designed for fixed-wing aircraft, gliders and surface models requiring direct servo connections. This receiver bridges the incredible range and low latency of ELRS with traditional wiring layouts, completely eliminating the need for bulky CRSF-to-PWM converter boards.

Key features

• 8 dedicated PWM output pins for direct servo and ESC connections.
• Built-in external voltage telemetry (EXT-V) pad handling up to 35V, perfect for monitoring main flight batteries up to 8S.
• Dual diversity 200mm antennas guarantee rock-solid signal reception regardless of aircraft orientation.
• Wide 4.5V to 8.4V DC input range comfortably handles high-voltage (HV) servo setups straight from a 2S LiPo or standard BEC.
• 100mW telemetry output power ensures a reliable data downlink for battery and signal stats over long distances.

Specifications

• Channels: 8 PWM
• Serial output: CRSF / SBUS (4-pin CRSF port)
• Frequency: 2.4GHz ISM
• Protocol: ELRS
• Input voltage: 4.5–8.4V DC
• External telemetry (EXT-V): Up to 35V DC
• Telemetry power: 100mW
• Antennas: Dual 200mm
• Dimensions: 43 x 30 x 15 mm
• Weight: 16.5 g

Ensure your radio transmitter is running ExpressLRS 3.0 or newer firmware before binding. To enable live battery readings on your radio screen, simply run a single wire from your main battery positive terminal to the receiver's EXT-V pin.