RadioMaster ER5C-i 2.4GHz ELRS PWM Receiver

The ER5C-i is specifically designed for surface models like RC cars, trucks, boats, and robots. It outputs standard PWM signals to directly control servos and speed controllers, leveraging the ExpressLRS protocol for superior range and latency compared to traditional surface RC systems.

The ER5C-i features automatic voltage detection. When connected via the included telemetry wire, it can sense and report either the external battery pack voltage (e.g., a car's main LiPo) or the regulated BEC voltage powering the receiver itself. This data is transmitted back to your ExpressLRS transmitter for real-time monitoring.

No, it does not. The receiver incorporates a high-sensitivity ceramic patch antenna directly onto the PCB. This design provides a clean, low-profile installation with no external antenna wire to route or damage, making it ideal for confined spaces in surface vehicles.

Yes, the ER5C-i is fully compatible with any transmitter using a 2.4GHz ExpressLRS external module (e.g., RadioMaster Ranger, HappyModel) or with radios that have internal 2.4GHz ExpressLRS, such as the RadioMaster Boxer, TX12, Zorro, and Pocket. Binding and setup follow standard ExpressLRS procedures.