JOGOTO Turbo Cooper X7 Series 2.4G 4CH RC Remote Control Helicopter with Gyro (Color May Vary) Stabile Flight Characteristics. Great for Beginners. Can fly outdoor in the wind weather(out door wind grade 3-4). Fly indoors and outdoors. Remote Controlled Single Rotor Helicopter. LCD on Transmitter. 2 PCS 3.7V 150 mAh Li-polymer battery. With 2.4GHz radio system, this helicopters can fly at the same time without interference. Flying time: about 5 - 6 minutes. Charging time: about 60 minutes. Control distance: About 30 meters.