Description
Radiomaster ER4 2.4GHz ELRS PWM Receiver
Introducing the RadioMaster ER4, a compact and lightweight ExpressLRS (ELRS) receiver designed to bring the power and range of ELRS to your smaller RC models. This receiver is specially designed for fixed-wing users, offering 4 PWM channels in a tiny package. It’s the perfect solution for small airplanes, boats, cars, and any other model that requires a lightweight receiver with standard servo outputs.
The Perfect Receiver for Small RC Models
With 4 dedicated PWM output channels, the ER4 is the ideal choice for controlling simple fixed-wing aircraft (throttle, ailerons, elevator), RC cars (throttle, steering), or boats. It provides a simple, direct, and reliable way to control your servos and ESC without the complexity of a full flight controller, making it perfect for traditional RC hobbyists.
Long-Range ELRS Performance
The ER4 is built on the revolutionary ExpressLRS system, bringing high performance, incredible reliability, and ultra-long range to your models. This gives you a much more robust and confident control link compared to older, traditional radio systems. For ultimate convenience, the receiver’s firmware can be updated easily via its built-in WiFi.
Built-in Voltage Telemetry
A standout feature of the ER4 is its ability to measure your main flight battery’s voltage (up to 35V / 8S) directly and send this vital information back to your radio. This allows for simple, real-time battery monitoring on your transmitter screen without needing any additional sensors or a flight controller, helping you know exactly when it’s time to land.
Specifications
- Brand: RadioMaster
- Model: ER4 ELRS PWM Receiver
- Input Voltage: DC 4.5V – 8.4V
- Protocol: ExpressLRS 2.4GHz
- Output Channels: 4 PWM
- Telemetry Power: 10mW
- Battery Voltage Sensing: DC 4.0V – 35V
- Dimensions: 30mm x 15mm x 5mm
- Weight: 3.0g
What’s in the Box?
- 1x ER4 2.4GHz ELRS PWM Receiver
- 2x Heat-shrink Tubes
- 1x Voltage Telemetry Wire
- 1x User Card
Check out all of our RadioMaster products, and all of our Radio Receivers and modules!
Size
Download
- ER4 Receiver User Manual
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