F-SERIES 502 Metal Structure 4CH Electric RTF RC Helicopter Features:*** Truly realiaze 4 channels of all-round flight helicopte- more real simulated flight mode brings you a new challenge. *** Indoor smooth flight-wireless remote control *** Move up and down-forward and backward-left and right-hovering-accurate positioning-etc *** According to your profiviency in helicopter operation-select the Beginner/Senior two operation mode. *** Lithium rechargeable bettery configuration can realize longer flight *** There are two ways to charge the Li-poly battery: By remote controller and USB cable. *** Can fine-tune the helicopter flying state in order to achieve better flight result. ****F-SERIES 502 Metal Structure 4CH Electric RTF RC Helicopter Specifications:*** The weight of the helicopter: 125g *** The rotor diameter: 130mm *** The length of the helicopter: 295mm *** Battery for helicopter: 3.7V 650mAh Li-poly rechargeable Battery *** Power System: N50 motor x 2pcs + 2PCS Brushed φ6 x 12 coreless Motors****Package Includes:*** 1 x 4CH RC Helicopter *** 1 x Remote Controller *** 1 x 3.7V 180mAh Li-poly Battery *** 1 set of Main Rotor Balde *** 1 x USB Cable *** English Instruction