Specifications: Main Rotor Diameter: 340 mm Tail Rotor Diameter: 340 mm Overall Length: 425 mm Receiver: 3-in-1 receiver Drive System: 2 X180 SD Battery: Li-Po 7.4V 850mAh All-up Weight: 188g (Battery not included) Servo: Weight 8.5g/speed 0.11 sec/60/torque 0.9kg/cm /dimension 22.5mmX11.5X24mm Transmitter: 4Channel Features: Coaxial structure can assure your helicopter flying stable and easy. It would be your best choice for the beginner. Fashion-style design according to real helicopter, you will feel wonderful 2X180 brushed motors as drive is powerful and suitable for various flight courses. Built-in sensitive gyro can assure the flight more stable. High quality servo is prompt in reaction 3-in-1 receiver, the weight is reduced and assure the fight more reliable. The helicopter will fly 8-12 minutes on 7.4 V 850mAh Li-Po battery pack. please contact us my Msn: lcm2000boy2000#hotmail.com, email is kenrich2000#gmail.com skype :lcm2000boy Show More