RadioLink Remote Control System AT9 2.4G 9CH Transmitter R9D Receiver for DIY Quadcopter RC Helicopter and Drone includes: 1x AT9 Transmitter (Model 2) 1x R9D receiver 1x CD Manual Full types control, " Aircraft" model type added DSSS, Vibration alarm, 3ms quick response 4096 precision, support S.BUS, USB online upgrade Built in Mini receiver which support and compatible with FUTABA S-BUS