JXD JD-385 2.4G 3D 4 Channel Six-Axis GYRO Mini UFO Flying Saucer Aircraft It adopts 2.4G frequency band, with long controlled distance, allow some helicopters to fly in the same area without any interference. Function: Up/Down, Left/Right, go Forward/Backward, Spin Left/Right (4-channel movement!) This 4-Axis aerocraft is suitable for indoor/outdoor flying, but make sure the outdoor wind force is not more than grade 4. Integrated 3.7v 240mAh Li-Po Battery