Wltoys V915 4CH 2.4G High Simulation Gyroscope RC Helicopter Switchable Mode Blue Brand: WLtoys . Model: V915 . Main Rotor Diameter: 13.78" / 35cm . Speed Control: Integrated . Required Radio: 4CH . Frequency: 2.4G . Flight Time: Approx. 7 minutes . Charging Time: Approx. 70 minutes . Battery: Rechargeable 7.4V 850mAh Lithium Battery . Transmitter Battery: 4 x 1.5V AA Batteries (Not Included) . Transmitter Brand & Model: WLtoys V915 . Control Distance: About 150 meters . Body Material: PA . Color: Blue . Dimensions: (16.92 x 4.02 x 6.61)" / (43 x 10.2 x 16.8)cm (L x W x H) . Weight: 29.98oz / 850g . Suitable for: Ages 14+ . Package Includes . 1 x Helicopter . 1 x Transmitter . 2 x Main Blades . 1 x Tail Blade . 1 x Charger . 1 x Balance Charger . 1 x User Manual