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								 Online orders ship from Canada.
Online orders ship from Canada.
								RadioMaster | ID: L-R9-6
ER4 2.4GHz ELRS PWM Receiver
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.
Package Includes:
1x ER4 2.4GHz ELRS PWM Receiver
2x Heat-shrink tube
1x Voltage telemetry wire (Type-A)
1x User Card
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
- Compatible with all 2.4GHz ExpressLRS modules and transmitters with built in 2.4GHz ExpressLRS
Specifications:
Item: ER4 2.4GHz ELRS PWM Receiver
Power supply: DC 4.5 - 8.4V
Antenna type: 15cm high sensitivity antenna
Wireless protocol: ExpressLRS 3.3.0 pre-installed
Output channel: 4CH PWM
Serial Output: CRSF / Sbus
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







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