Radiomaster ER4 2 4GHz 4CH ExpressLRS ELRS RX PWM Receiver Support Voltage Telemetry for F3P RC Airplane Car Boat TankThe RadioMaster ER series of PWM receivers are based on the revolutionary ExpressLRS system It offers high performance high reliability flexible configuration quick 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 Description Brand RadiomasterItem ER4 2 4GHz ELRS PWM ReceiverPower supply DC 4 5 8 4VAntenna type 15cm high sensitivity antennaWireless protocol ExpressLRS 3 2 pre installedOutput channel 4CH PWMTelemetry power 10mwBattery voltage detection range DC 4 0 35VWeight 3 0 gramsDimensions 30 15 5mmFirmware Device Category Radiomaster 2 4Ghz Device RadioMaster ER4 2400 PWM RXFeatures Based on the Revolutionary ExpressLRS System High performance high reliability flexible configuration quick 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 Package