The RadioMaster ER3C-i receiver is built on the innovative ExpressLRS protocol. It provides high performance, dependable signal, versatile configuration, and quick response time, offering a new experience for your projects and applications.

The ER3C-i ELRS receiver can drive up to 3 servos and has built-in receiver voltage telemetry and battery telemetry with the ability to automatically detect which voltage input to use. The ER3C-i features a built-in high-sensitivity ceramic antenna, it is designed for all types of surface models and provides a clean install without antenna wires to worry about.

Features
Built-in high-sensitivity ceramic antenna
Based on the Revolutionary ExpressLRS System
High performance, high reliability, flexible configuration, low latency, and strong link quality
Supports 3 PWM Channels
Automatically detects voltage telemetry of external battery voltage or receiver battery / ESC BEC voltage
Optimized ground up PCB design
Supports Wi-Fi updates and WEBUI configuration
Built-in a TCXO (temperature compensated crystal oscillator), ensures stable and accurate performance in any environment
Designed for all types of surface models
Compatible with all 2.4GHz ExpressLRS modules and transmitters with built in 2.4GHz ExpressLRS