Product name:Radiomaster ER4 2.4GHz 4CH ExpressLRS ELRS RX PWM Receiver Support Voltage Telemetry for F3P RC Airplane Car Boat Tank Precise details: The 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: Radiomaster 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 Features: * 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 Included: 1 * ER4 2.4GHz ELRS PWM Receiver 2 * Heat-shrink tube 1 * Voltage telemetry wire (Type-A) 1 * User Card