Product overview
The RadioMaster ER4 2.4GHz ELRS PWM Receiver provides four PWM channels and can drive four servos simultaneously. Designed for applications requiring a small or lightweight receiver, it offers full-range reception in a 30*15*5mm format weighing 3.0 grams. Its construction combines a PCB designed from the ground up, a 2.54 mm connector and a 15cm high sensitivity antenna. ExpressLRS 3.3.0 comes pre-installed, with support for Wi-Fi updates and WEBUI configuration. The receiver is compatible with all 2.4GHz ExpressLRS modules and transmitters featuring built-in 2.4GHz ExpressLRS.
The ER4 operates from a DC 4.5 - 8.4V power supply and provides automatic voltage telemetry for an external battery or the receiver voltage. Battery voltage detection covers DC 4.0- 35V, and telemetry power is 10mw. Its firmware device category is Radiomaster 2.4Ghz, with RadioMaster ER4 2.4GHz PWM RX as the device selection. Each package supplies one ER4 2.4GHz ELRS PWM Receiver, two heat-shrink tubes, one Type-A voltage telemetry wire and one User Card, bringing the receiver and its supplied accessories together.
