BETAFPV Lite receiver is based on the ExpressLRS project, an open-source RC link for RC applications. ExpressLRS aims to achieve the best possible link performance in both speeds, latency, and range. This makes ExpressLRS one of the fastest RC links available while still offering long-range performance.Message from BETAFPV regarding Flat antenna range issues:The ELRS Lite Receiver flat antenna V1.1 is coming to see you again. Range issues and failsafe at around 100 meters have been resolved compared with V1.0. Now, the V1.1 flat antenna receiver can reach 600 meters with BetaFPV Moxon antenna. Please feel free to email support@betafpv.com and our support team will help you if you have any issues. Check out all our receivers, and our entire BetaFPV selection! Specifications Input voltage: 5V Frequency bands: 2.4GHz ISM MCU: ESP8285 Telemetry power: 17mW Antenna: Integrated SMD ceramic antenna Size: 10*10mm Weight: 0.47g tower or .53g flat (with SMD ceramic antenna) Note: The firmware version of the Lite receiver manufactured by our company is ELRS 1.1.0; ELRS Innovative team has officially released version 1.2.0, which is not compatible with the 1.1.0 version. We suggest our customers upgrade this receivers' ELRS version to 1.2.0 if needed. Significantly, the TX module and receiver have to be in the same ELRS version, otherwise, the frequency cannot match successfully. Includes 1x BETAFPV ELRS Lite receiver 2x Spare shrink tube 4x 30awg silicon connection wires (1 black, 1 red, 1 white, 1 yellow)