WALKERA 59DQ Brushless Tail 6CH Metal Upgrade Helicopter - 2.4GHz Specification Tail Motor Type: 20-003 (Brushless) Servo: weight 8.5g;speed 0.11sec/60°(4.8V);torque 0.9kg/cm (4.8V) Dimension: 22.5 * 11.5 * 24mm Receiver: RX-2606 Gyro: Built-in All-up Weight: 643g (Battery included) Transmitter: WK-2601 Main Motor Type: 380 PF Tail Rotor Dia.: 136 mm Main Rotor Dia.: 630 mm Battery: 11.1V 1500mAh Li-Po Overall Length: 650 mm Features CCPM mixing control system and collective pitch control system make perfect 3D maneuvers such as rolls, inverted,and swoop flights The compact structure characterized by metal main frame and metal tail boom makes the helicopter more stable.Easy-to-be mounted parts like servo are used 380PF brushed motors as drive are powerful and make you fly with much more enjoyment The flight time on the saturated Li-Po battery will be up to 6-8 minutes, depending on your flight The usage of 2.4G technology is prompter in reaction, more sensitive in operation, and stronger in anti-interference