Radiomaster ER3C-i 2.4GHz ExpressLRS ELRS PWM Receiver w/ Built-in Antenna for MT12 Radio Transmitter The RadioMaster ER3C-i receiver is based on the high-performance, revolutionary ExpressLRS system, featuring high reliability, highly flexible configuration, ultra-quick response speeds, and an ultra-long receiving range, bringing with it a brand-new usage experience.The ER3C-i ELRS receiver can drive up to 3 servos and has built-in receiver voltage telemetry and battery telemetry with the ability to automatically detect which voltage input to use. The ER3C-i features a built-in high-sensitivity ceramic antenna, it is designed for all types of surface models and provides a clean install without antenna wires to worry about. Description: Brand: RadioMaster Item: ER3C-i 2.4GHz ELRS PWM Receiver Power supply: DC 4.5 - 8.4VAntenna type: Built-in high-sensitivity ceramic antennaWireless protocol: ExpressLRS 3.3.0 pre-installedOutput channel: 3CH PWMTelemetry power: 10mWBattery voltage detection range: DC 4.0 - 35VWeight: 4.2 gramsDimensions: 26.1*18.5*13.0 mmFirmware: Device Category: Radiomaster 2.4Ghz / Device: RadioMaster ER3C-iFeatures: * Built-in high-sensitivity ceramic antenna * Based on the Revolutionary ExpressLRS System * High performance, high reliability, flexible configuration, quick response speed and ultra-long range * Supports 3 PWM Channels * Automatically detects voltage telemetry of external battery voltage or receiver battery / ESC BEC voltage * Optimized ground up PCB design * Supports Wi-Fi updates and WEBUI configuration * Built-in a TCXO (temperature compensated crystal oscillator), ensures stable and accurate performance in any environment * Designed for all types of surface models * Compatible with all 2.4GHz ExpressLRS modules and transmitters with built in 2.4GHz ExpressLRS Package Included: 1x Radiomaster ER3C-i 2.4GHz ELRS PWM Receiver