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The inner gyroscope with function of dual rate and head lock, which designed for helicopters specially. GYRO version adopts AVCS ( Angular Vector Control System ), which makes the function of head lock more outstanding and steady. AVCS system: Since rudder trim changes caused by wind and other meteorological changes, and varieties of helicopter attitude changes are automatically cancelled, tail rudder operation becomes easy, making it perfect for 3D flight. Product Details 100% Brand New.Easy to fly. Miniature size & light weight. Super wide infrared control miniature design for indoor flying 19cm long and weighing an incredible 34 grams Built-in gyroscopes Charging Time: 30-45 minutes Flight Duration: 8-12 minutes Control Specification: forward / backward / up / down / left / right Transmitter Batteries: 6 x 1.5v AA Alkaline Batteries (Battery not included, Please prepare by yourself) LED flashing lights. Auto-protection for charging to avoid overcharge. High capacity battery and strong power motor enable the helicopter to fly much longer and more powerful Helicopter Size : 19cm L x 4.5cm W x 9.5cm H Item Packing