RadioMaster ER4 2.4GHz ELRS PWM Receiver

Regular price $14.99 Sale

Availability: Available Unavailable

Product SKU: 74E-12108

Product Details

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.

Check out all our ExpressLRS ProductsReceivers, and the rest of our RadioMaster Products!




  • 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

    Warranty Policy:

    If any warranty needs for this product arise, please note that the manufacturer of this product is one of the few manufacturers we carry that requests the end user to contact them directly for any troubleshooting or possibly defective items. We must follow these policies set by these manufacturers. Please make sure to contact them directly if you feel your product is defective in any way. Reach out to us if you need an email address or contact link for this manufacturer.