RadioMaster ER4 2.4GHz ELRS PWM Receiver

RadioMasterSKU: RMS-RX-ER4

Sale price$14.99

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RadioMaster ER4 2.4GHz ELRS PWM Receiver

The RadioMaster ER series PWM receivers utilize the groundbreaking ExpressLRS system, delivering exceptional performance, reliability, versatile configuration options, rapid response times, and an extended range for an unparalleled hobby experience.

Specifically, the ER4 PWM receiver can power up to 4 servos at once. Its compact design makes it perfect for smaller aircraft, ship, or car models, ensuring full range while remaining lightweight and compact.


  • 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
  • Compatible with all 2.4GHz ExpressLRS modules and transmitters with built in 2.4GHz ExpressLRS


  • 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: 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

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