ITEM NO:3206 DESCRIPTION:4ch Silver-bird A Co-axial Helicopter PACKAGE:box G.W.(kgs):7.5 N.W.(kgs):6 CARTON SIZE (cm):47x53x35 PACKING:4pcs/ctn (1) .Main rotor diameter: 340mm (2) .Weight: 215g; Length: 390mm (3). Transmitter: standard 4 channel (4). Power system: 2 x 180 motor (5). Battery: lithium polymer 7.4V 850mAh (6). Control distance: 100-500m (7). Fly time: 10-15 minutes (8) .Servo: 8g, 1.3Kg/cm, 0.12s/60. (9). Content:.Factory assembled helicopter.Transmitter..AC mains charger. Li-Po 7.4V 850mAh .Spare main rotor set.Instruction manual Features: 1.Precise CO-axial counter rotation blade desingn and professionally balance weight bar will provide you stable and simple flight 2.Speedy mini servo will provide your helicopter more exact, agile and smoothly flight. 3.Ready for flight out of box. 4.Li-polymer battery power supply enables it to fly lighter and longer. 5.Head-tail apart packaging design. 6The helicopter is applicable to a 300A machine