JHEMCU ExpressLRS ELRS 900RX 915MHz/868MHz OpenTX High Refresh Rate Ultra-Small Long Range Receiver for RC FPV Racing Drone Specifications: Model: ExpressLRS ELRS 900RX Frequency Band: 915MHz FCC (AU EU firmware updates required separately) Chip Type: ESP8285 MCU RF Chip: SX1276 Frequency Range: 915MHZ Max Reception Refresh Rate: 500HZ Min Reception Refresh Rate: 25HZ Operating Voltage: 5V Weight: 0.6g Working Protocol: CRSF (Betaflight) Dimensions: 11mm x 18mm x 3mm Antenna Connector: IPEX MHF Features: * Open-Source Design: Built on the ExpressLRS open-source architecture, ensuring flexibility and constant updates. * High Refresh Rate: A variable refresh rate of 25Hz-500Hz, perfect for FPV racing and long-distance FPV. * Compact and Lightweight: Designed especially for tight setups, ideal for FPV racers and Tinywhoop drones. * Integrated Ceramic Antenna: SP24S built-in ceramic antenna boasts a peak gain of up to 3.7dB, eliminating the need for external fixed antennas for a cleaner setup. * Intuitive LED Indicators: Quick feedback with LED modes indicating pairing, signal status, and WIFI upgrade mode. Indicator status: Double flash: code matching mode Flashing slowly: no transmission signal received Steady on: transmit signal received Flash: WIFI upgrade mode Package Included: 1x Receiver 4x Wires 1x T-type Antenna