Highlights Superior flight stability and fly safely. 4 in 1 controller. Newly designed eletricity saving function. 4-channel full scale infrared remote control. 3D omni-directional flight and 360 degree exact directional function. High speed and low speed for choosing freely. General Spec Model 817 Type full scale remote control Channel 4-channel Material metal and plastic Function support forward, backward, ascending, descending and turn left or right function. Compatibility It's suitable to fly indoor and outdoor. It's suitable for kids above 14 years old. Battery for Helicopter Built-in 1 × 7.4V 1 Li-polymer rechargeable battery pack Battery for Radio Control 8 × 1.5V AA battery (not included) Others set of accessories