Designed for a very stable flight and strong aluminium structure for added resistance. Digital proportional Remote Controlled Coaxial Helicopter 3-channel Infra-Red Remote control. Fully controlled movements (Up / Down, Right / Left, Forwards / Backwards) Specifications Fuselage length: about 220 mm Main rotor diameter: 186mm Heigh: 95mm (approx.) Weight: 44.5g (approx.) Frequency: Infrared Control System - Bands A, B & C Operational range: about 10m (Line of sight required) Flying time: about 6-7 minutes Charge time: about 20 - 30 minutes Helicopter batteries: 180mAh 3.7V Lithium Polymer Transmitter batteries: "AA"1.5V X 6 (Not Included) Suitable For Indor Flight Or Outdoor With No Wind Not recommended for children under 14 years old.