Description
The RadioMaster ER series of PWM receivers are based on the revolutionary ExpressLRS system. It offers high performance, high reliability, flexible configuration, fast response speed and ultra-long range bringing you brand new experience with your hobby.
The ER4 PWM receiver can drive 4 servos simultaneously. Designed with a very small volume, it is suitable for small aircraft models, ship models, car models and other models that require a small or lightweight receiver while still providing full range.

Features
- Based on the Revolutionary ExpressLRS System
 - High performance, high reliability, flexible configuration, fast response speed and ultra-long range
 - Support 4 PWM Channel
 - Optimized ground up PCB design
 - Automatically voltage telemetry of external battery voltage or built-in receiver voltage
 - Supports Wi-Fi updates and WEBUI configuration
 - High quality 2.54 mm connector
 - Standard 15 cm High Sensitivity Antenna
 - For small aircraft, boats and cars and more
 
Specification
- Item: ER4 2.4GHz ELRS PWM Receiver
 - Power supply: DC 4.5 – 8.4V
 - Antenna type: 15cm high sensitivity antenna
 - Wireless protocol: ExpressLRS 3.3.0 pre-installed
 - Output channel: 4CH PWM
 - Telemetry power: 10mw
 - Battery voltage detection range: DC 4.0- 35V
 - Weight:Â 3.0 grams
 - Dimensions: 30*15*5mm
 - Firmware: Device Category: Radiomaster 2.4Ghz / Device: RadioMaster ER4 2400 PWM RX
 







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

								


				
Anonymous (verified owner) –
Star Review Only
Graham (verified owner) –
Star Review Only
James P. (verified owner) –
Excellent
Graham (verified owner) –
Star Review Only
Colin Teasdale (verified owner) –
Took me a while to figure out the sbus part but its actually a lot easier once I stopped looking for the complicated answer.:)
Best value 4 channel rec around
Stephen Robertson (verified owner) –
Very small . It will be going into one of my planes . I will buy more of these
steveroby (verified owner) –
My rating above should have been 5 stars , not 1 . Sorry
Shaun S. (verified owner) –
Great little receiver. Found it easy to update.
Stephen R. (verified owner) –
Great receiver for Planes & flying wings. It has build in batt volt telemetry , thats one reason I bought it