Flying distance:150m Battery:7.4V 850mAh Fly time:15 minutes Helicopter size:40*9*16cm Fly height:50m 2.4G 4CH Single Oar Radio Remote Control airplane Best service+best price+best delievery for youRotor diameter:40cmTail rotor diameter:9cmTotal weight:258g(include battery)Helicopter size:40*9*16cm Packing size:67*12.5*24cmFunction: flight rise and fall, forward, backward, left, right, left, ...