RadioMaster Nexus-XR Helicopter Flight Controller Integrated 2.4GHz ExpressLRS Receiver (backorder)RadioMaster Nexus XR Helicopter Flight Controller Integrated 2. 4GHz ExpressLRS Receiver For RC Helicopter The Nexus XR revolutionizes helicopter flight controllers by integrating a cutting edge ExpressLRS receiver with dual Semtech SX1281 2. 4GHz transceivers. This built in receiver delivers exceptional RF performance, superior range, reliability, and effortless setup. It eliminates the need for external receivers, simplifying installation and