Specification: 1)Overall Length: 600 mm 2)Main Rotor Diameter: 630 mm 3)Tail Rotor Diameter: 145 mm 4)Speed Controller: WTS-20A-02 5)Battery: 11.1V1200mAh Li-Po Battery/Charger 6)Drive System: Outrunner brushless motor/ESC 7)All-up Weight: 600g (Battery included) 8)Transmitter: WK-0701 ,Gyro: WK-G007 ,Receiver: RX-701 9)Servo: weight 9.1g ; speed 0.12sec/600; torque 1.1kg/cm;dimension 22.5X11.8X27mm 10)Tail blade driven by belt! Features 1). NOR collective pitch structure make perfect 3D maneuvers such as roll, inverted, and swoop flights. 2). Integrated structure of main body is innovative and compact in design. The autorotation landing system, made of high quality one-way bearing, maximally protects your helicopter from damage . 3). Tail blades driven by belt provide easy adjustment, stable flight, and low noise. 4). 380 motor as the main power is powerful and makes the flight much stable. 5)A 7-channel transmitter (PCM701) can provide free adjustment of pitch (PIT) parameter, throttle curve and servo exponential function.