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

Specifications

• 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

Firmware

• Device Category: Radiomaster 2.4Ghz
• Device: RadioMaster ER4 2400 PWM RX

Package Contents

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