The RadioMaster ER series of PWM receivers is built on the innovative ExpressLRS protocol. It provides high performance, dependable signal, versatile configuration, and quick response time, offering a new experience for your projects and applications.

The ER4 PWM receiver can drive 4 servos simultaneously. Designed for a very small volume, it is suitable for any application that requires a small or lightweight receiver while still providing full range.

Features:

• Based on the Revolutionary ExpressLRS System
• High performance, high reliability, flexible configuration, low latency, and strong link quality
• 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 any application that requires a small or lightweight receiver
• Compatible with all 2.4GHz ExpressLRS modules and transmitters with built in 2.4GHz ExpressLRS

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: 3.0 grams
• Dimensions: 30*15*5mm
• Firmware: Device Category: Radiomaster 2.4Ghz / Device: RadioMaster ER4 2.4GHz PWM RX

                                  Size:

RadioMaster ER Series Receivers

• ER4 ELRS PWM Receiver
• ER6 ELRS PWM Receiver
• ER8 ELRS PWM Receiver
• ER6G/ER6GV ELRS PWM Receiver
• ER8G/ER8GV ELRS PWM Receiver

Package Includes

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

ER4 Receiver is installed with ExpressLRS as standard. 

ExpressLRS is an open-source, high-performance radio control link that delivers exceptional range and low-latency communication using advanced LoRa technology. It’s highly customizable and perfect for RC enthusiasts looking for reliability and efficiency.

Pair your ExpressLRS with Radiomaster’s top-tier transmitters and receivers. Radiomaster products are designed to maximize the benefits of ExpressLRS, offering state-of-the-art performance for your RC adventures. Upgrade your RC experience with the unbeatable combination of ExpressLRS and Radiomaster—engineered for excellence and tailored for you.