Nine Eagles Galaxy Visitor 3 MASF12 4CH 2.4GHz RC Quadcopter RTF W/Transmitter Mode 2 Throttle Chanel's Three Settings: Entry-level Setting,Altitude Hold Setting and Normal Setting "Headless Flying" under intelligent control mode make it extremely easy for beginner to manage flying a R/C quadcopter "Auto-Return" function-the safety guard against lose control of aircraft Switch on/off of accelerometer Build in Altitude sensor Signal Loss Protection Function