The ARCHER GR8 receiver features the new ACCESS protocol. ACCESS provides the lower latency and increased performance of our previous G-RX8 receivers. With OTA (Over-The-Air) function support firmware upgrades will be very easy, no more wires. The ARCHER GR8 also has an upgraded high precision variometer that gives pilots more accurate and quicker altitude and vertical speed data. Now you can enjoy more accurate and quicker vario audio feedback from your FrSky ACCESS enabled transmitter.