The RadioMaster ER Series PWM receivers are built around the innovative ExpressLRS protocol, delivering high performance, reliable signal transmission, flexible configuration, and fast response times for a wide range of R/C applications.

The receiver can drive up to 4 servos simultaneously. Designed with an ultra-compact and lightweight form factor, it is ideal for applications where space and weight are critical, while still providing full-range signal performance.

Features

• Built on the revolutionary ExpressLRS protocol
• Delivers high performance, reliable signal transmission, flexible configuration, low latency, and excellent link quality
• Supports 4 PWM channels
• Ground-up optimized PCB design for improved performance and reliability
• Supports automatic voltage telemetry for external battery voltage or built-in receiver voltage
• Supports Wi-Fi firmware updates and WebUI configuration
• Equipped with a high-quality 2.54 mm connector
• Includes a standard 15 cm high-sensitivity antenna
• Designed for any application requiring a compact or lightweight receiver
• Compatible with all 2.4GHz ExpressLRS modules and transmitters with built-in 2.4GHz ExpressLRS

Specification

Package Includes

• 1 * ER4 2.4GHz ELRS PWM Receiver
• 2 * Heat-shrink tube
• 1 * Voltage telemetry wire (Type-A)
• 1 * User Card