Length: 635mm ●Height: 230mm ●Main Rotor Diameter: 710mm ●Tail Rotor Diameter: 158mm ●Motor Drive Gear: 13T ●Main Drive Gear: 150T ●Autorotation Tail Drive Gear: 106T ●Tail Drive Gear: 25T ●Drive Gear Ratio: 1:11.5:4.24 ●Weight(w/o power system): 450g ●Flying Weight: Approx. 780g ●Color carton:27.3x10x6.6cm ●Outer carton:56x31x28cm ,24sets/ctn T-REX 450 PRO Kit Set X1 set ●325 Carbon blades X1set ●RCE-BL35X 35A Brushless ESC X1 ●450M Brushless motor(3500KV) X1 Radio transmitter and electronic equipment required for assembly: 1.Transmitter(6-channel or more,helicopter system) 2.Receiver(6-channel or more) 3.Pitch gaugeX1 4.11.1V 3S Li-Po 2000~2300mAh batteryX1 5.Head lock gyroX1 6.Specialized servoX1 7.CCPM servoX3 Features ●Newly designed head block with high rigidity and stability. ●Single piece integrated design of main bearing block and servo mount. ●Single piece integrated design of anti-rotation guide and gyro mount. ●Single piece integrated landing gear. ●Highly stable flybar control system. ●High precision bearing mixing arms. ●Newly designed high resolution swashplate. ●Single piece battery mount with integrated canopy mount designed to bring CG closer to disk plane. ●Highly rigid frame with single piece carbon side and bottom plates. ●Highly efficient shaft driven tail design. ●Weighted tail rotor blade grips to repel centripetal forces. ●Straight-up in-frame rudder servo mount for improved geometry. ●Newly designed aerodynamic canopy. ●Newly designed high torque motor. ●Newly designed high strength main blade grips.