Features: ELRS 915MHz CRSF: This product adopts ELRS 915MHz CRSF technology, which can achieve stable signal transmission over long distances. Open source high refresh rate: Equipped with open source design and high refresh rate functionality, it can meet the needs of FPV freestyles drones for fast response and precise control. Super small long-distance receiver: Appearing in a super small design, it is easy to install in limited space while maintaining stable connection during long-distance flights. High performances receiver: This product has strong reception capability, which can stably and accurately receive and decoding signals sent by the transmitters, and transmit them to the flight controller. Stable signal transmission: Using 915MHz CRSF technology, it has strong anti-interference ability and stable signal transmission, effectively reducing signal loss and delay issue. Specifications: Frequency range: 915MHz Receive refresh rate: 25Hz-500HZ Working voltage: 5V Firmware: BETAFPV_900_RX 3.0.0.HEX Package Includes: 1x Receiver 4x Wire 1x T type Antenna note: Frequency matching steps: 1.After connecting the receiver to flight control, connect a USB to power the flight control. After inserting the USB for the first time, immediately disconnect the USB when the LED light on the receiver goes out. Repeat the operation twice, and when the USB is inserted for the third time, the LED will start to double flash, and the receiver will enter the pairing modes. 2. After correctly connecting the 915M (868M) ELRS high-frequency module to the remote control, copy the ELRS Transfer the LUA file to the SDcard in the remote control, in the directory SDCard/Scripts/tools, and then run ELRS LUA performs a Bind operation. 3. After successful binding, the LEDs on the receiver will turn on continuously and can also receive telemetries signals.