1、Indoor flight: Double propeller fixed altitude remote-controlled helicopters are suitable for indoor flight without worrying about weather or space limitations. 2、Full scale operation function: The helicopter has full scale operation functions of ascending, descending, advancing, retreating, turning left and right, and fixed height, making the operation simple and flexible. 3、Height fixing function: The helicopter is equipped with height fixing function, which can stably fly at a certain altitude, reduce operational difficulty, and improve flight stability. 4、Remote control operation: By using the remote control, the flight of the helicopter can be remotely controlled, adding fun and challenge. 5、Suitable for beginners: Double blade fixed altitude remote controlled helicopters are easy to operate, suitable for beginners to practice flight skills and improve flight experience. Features: Indoor flight: Double propeller fixed altitude remote-controlled helicopters are suitable for indoor flight without worrying about weather or space limitations. Full scale operation function: The helicopter has full scale operation functions of ascending, descending, advancing, retreating, turning left and right, and fixed height, making the operation simple and flexible. Height fixing function: The helicopter is equipped with height fixing function, which can stably fly at a certain altitude, reduce operational difficulty, and improve flight stability. Remote control operation: By using the remote control, the flight of the helicopter can be remotely controlled, adding fun and challenge. Suitable for beginners: Double blade fixed altitude remote controlled helicopters are easy to operate, suitable for beginners to practice flight skills and improve flight experience. Specifications: Brand: SYMA S111H Item: Remote Control Helicopter Material: PA\PC Motor: Brushed Motor Frequency: 2.4Ghz Battery: 3.7V 150mah Remote Control Battery: 4* AAA Battery(not Included) Charging Time: 40min Fly Time: 6-8min Remote Control Distance: 10m Size: 21*9.5*7cm Weight: 50g Note: * Don't over-charge or over-discharge batteries. Don't put it beside the high-temperature condition. Don't throw it into the fire. Don't throw it into water. * There could be some deviations due to manual measurement or slight color difference owing to photographing condition. Thank you for your understanding. Package Information: Package Size: 32*16.3*6.5cm Package Weight: 200g Gift Box Package Package List: 1 * Remote Control Helicopter 1 * Remote Controller 1 * Flight Battery 1* Spare Propeller 1 * USB Cable 1* User Manual