Radiomaster ER4 PWM Mini Receiver 2.4G 4CH 10mw ExpressLRS Support Voltage Telemetry Wifi Update For Aircraft Boat Car


Color: ER4


It Will Be available in the end of this Month;
when you order it,please extend the shipping to 20days,
So we have enough time to handle your order,
thanks for your understanding!

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.



  • 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


  • Item: ER4 2.4GHz ELRS PWM Receiver

  • Power supply: DC 4.5 - 8.4V

  • Antenna type: 15cm high sensitivity antenna

  • Wireless protocol: ExpressLRS 3.2 pre-installed

  • Output channel: 4CH PWM

  • Telemetry power: 10mw

  • Battery voltage detection range: DC 4.0- 35V

  • Weight: 3.0 grams

  • Dimensions: 30*15*5mm


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

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