Tail Rotor Dia. B : 410 mm Main Rotor Dia. A : 410 mm Gyro: Built-in Drive Motor: 2*180PH Receiver: RX-2403D All-up Weight: 269g (Battery included) Transmitter: WK-2402 Battery: 7.4V 800mAh Li-Po Overall Length: 336 mm Servo: WK-7.6-3 ;weight 8.4g ;speed 0.12sec/60o(4.8V) ;torque 1.4kgf.cm(4.8V) ;dimension 22.5X11.5X24mm