... prevent grind protection2.Cell types: polymer lithium ion 3.7 V battery 220 ma belt protection plate3.Product configuration: remote USB ... NO.RPC149685 DESCrc helicopter 3.5 CH RC Helicopter with Camera,USB RPC149685 PACKAGEWindow boxQTY/CTN18pcsCBM0.167MEAS.(CM)60* ... ,Medium,Big.2CH,3CH,3.5CH,4CH...available!B.Heli with different functions: Iphone & Android Control,Camera Helicopters, Hanging basket ...