1. iphone rc helicopter 2. stable performance 3. 3.5 ch Gyro. 4. all certifications. Features:1.Main blades stall protection: The helicopter stop working after the main blades stalling 2 seconds. The overload protection for circuit will work. 2.Power on protection:when powering on,if the transmitter lever is not at the bottom.The helicopter doesn't work and transmitter's power light will flash. ...