Description: ExpressLRS is an open-source RC link for RC applications. Everyone could find this project on or join the discussion in Group. ExpressLRS is based on Lora SX127x or SX1280 hardware for RX and TX respectively. it aims to achieve the best possible link performance in both speeds, latency, and range. At 900 MHz a maximum of 200 Hz packet rate is supported. At blistering 500Hz is currently supported with a custom OpenTX build. This makes ExpressLRS of the fastest RC links available while still offering long-range performance. More and more vendors start to support the ExpressLRS radio protocol in different parts, like radio with ELRS in stock, drone with built-in ELRS receiver, ELRS TX module for JR bay, or bay. betafpvs team take part in this project and provide a series of ExpressLRS components. ExpressLRS uses the serial protocol (AKA protocol) to communicate between the receiver and the controller board. So make sure your controller board Support the serial protocol. Next, we use the controller with Betaflight to show how to set up the protocol. Specification: Weight: 0.47g (with SMD ceramic antenna) Size: 10mm*10mm/0.39x0.39inch Telemetry power: 17mW Frequency bands (Nano receiver 2.4G version): ISM Input voltage: 5V Antenna: Integrated SMD ceramic antenna Package Includes: 1 ELRS Lite receiver 2 spare shrink tubing 4 30awg silicon connecting wire (1 black, 1 red, 1 white, 1 yellow)