RadioMaster ER8 ExpressLRS 2.4GHz 8 Channel Receiver HP0157-RX-ER8

The RadioMaster ER8 is a high-performance 2.4GHz ExpressLRS (ELRS) receiver designed specifically for fixed-wing RC aircraft. Offering eight PWM output channels, advanced telemetry capabilities and exceptional RF performance, the ER8 delivers the ultra-low latency and reliable long-range control that ExpressLRS is renowned for. Housed in a robust one-piece moulded case, it also features a CRSF interface for sensor expansion, making it an excellent choice for sport, scale and FPV fixed-wing aircraft.

Features

• Genuine RadioMaster ER8 ExpressLRS receiver
• Designed specifically for fixed-wing aircraft applications
• Compatible with all 2.4GHz ExpressLRS transmitters and modules
• Eight PWM output channels for direct servo connection
• Advanced telemetry support for real-time flight information
• 4-wire CRSF interface for telemetry sensor expansion
• High-performance RF design for reliable long-range control
• Durable one-piece moulded case for improved strength and protection
• 20cm high-sensitivity antenna for excellent signal reception
• Compact and lightweight design for easy installation

Specifications

• Brand: RadioMaster
• Model: ER8
• Manufacturer Part Number: HP0157-RX-ER8
• SKU: RDM-HP0157-RX-ER8
• Product Type: ExpressLRS Receiver
• Protocol: ExpressLRS (ELRS) 2.4GHz
• Channels: 8 PWM Outputs
• Operating Voltage: DC 4.5V–8.4V
• Antenna: 20cm High-Sensitivity External Antenna
• Telemetry: Supported
• CRSF Interface: Yes (4-Wire)
• Dimensions: 43 × 30 × 15mm
• Weight: 16.5g

Includes

• 1 × RadioMaster ER8 2.4GHz ExpressLRS 8 Channel Receiver
• 1 × Type-B Voltage Telemetry Wire
• 1 × CRSF Interface Cable
• 1 × ELRS Receiver to SBUS Cable
• 1 × User Card

FAQ

What models is the ER8 designed for? The ER8 is primarily designed for fixed-wing RC aircraft requiring up to eight individual servo outputs, making it ideal for trainers, sport aircraft, scale models and gliders.

Which transmitters is it compatible with? It is compatible with any 2.4GHz ExpressLRS transmitter or external ExpressLRS module, including RadioMaster, Jumper and other ELRS-compatible systems.

Does the ER8 support telemetry? Yes. The receiver supports ExpressLRS telemetry, allowing compatible transmitters to display receiver voltage and other telemetry data. It also includes a CRSF interface for connecting additional telemetry sensors.

Can I connect servos directly? Yes. The receiver provides eight standard PWM outputs, allowing conventional RC servos to be connected directly without additional adapters.

Is this suitable for multirotors? While it can be used in many applications, the ER8 is specifically designed for fixed-wing aircraft. Pilots building multirotors will typically choose one of RadioMaster's compact serial ELRS receivers instead.

Important Notes

• Requires a compatible 2.4GHz ExpressLRS transmitter or transmitter module.
• Update transmitter and receiver to compatible ExpressLRS firmware versions before binding.
• Mount the antenna clear of carbon fibre, batteries and high-current wiring for optimum signal performance.
• Perform a full range check before every flight.
• Secure the receiver to minimise vibration during operation.
• Ensure the supplied operating voltage remains within the specified 4.5–8.4V range.
• Protect the receiver from moisture and excessive heat.
• Follow all RadioMaster installation and safety instructions.