Feature Highlights: Designed with completion in mind, which can give a high-efficient splendid manifestation in dynamic and static flight. High strength lateral plate with light weight and simple structure ensure more convenient maintenance and assembling. Auto-rotation system adopts one-way bearing control. High strength carbon fiber tail stand bar. High precision main rotor control group. Tail rotor belt driven system. New style tail rotor blade with high precision tail rotor drive and push-pull control group ensure a better tail locking performance. Very stable in hovering and tracking flying, also with superb 3D performance Hold Rotation System Tail Belt Drive System High Efficiency Blade High Efficiency Tail Blade Rear Tail Servo Stand Super Iron Main Shaft High Rigidity Aluminum Body Super Iron Landing Skids High Strength Carbon Fiber Tail Boom Support Set Specifications: Length: 845mm Height: 311mm Main rotor length: 425mm Wheelbase: 566mm Main rotor diameter: Φ929mm Tail rotor diameter: Φ176mm Body Weight: about 850g Motor gear: 15T Master gear: 133T Tail drive gear: 108T Tail driven gear: 24T Drive ratio: 8.87:1:4.5 Package included : 1 x Aluminum Helicopter Body 1 x Plastic Canopy 1 x Wooden Main Blades 1 x Main Blade Holder 1 x User Manual (English) To fly this helicopter, customer requires to have: Brushless Motor: above Φ35*41.5mm ESC : above 60A Lithium (Li-Po) Battery: 22.2V 6S (2200 ~ 2500mAh+) CCPM Transmitter: 6 channels+ for Helicopter System Receiver: 6 channels+ Pitch Gauge: 1pc Specialized Tail Servo x 1 Head Lock Gyro x 1 CCPM Servo x 3 (4pcs of 18g or 36g Servos) Balance charger and adapter ECCPM 120 Degrees Adjustable Pitch Control System. Its Modularized Design facilitates daily repair and maintenance. The canopy is of delicate design and appearance. Tail Rotor Blade Pitch Control System.