Please use new batteries(not included) in the Remote and charge the helicopter for 1 hour before first use. It has a built-in sensor which allows this helicopter to sense anything below it to move it upwards. Voltage Protection System, Indoor outdoor flight. FUNCTION OF REMOTE - the remote control has two functions, the start button is used for on-off the helicopter and by pressing the up button the toy helicopter moves upward. Cool LED lights with 3DFlight include 1x Helicopter 1x Remote control 1x Charging cable.