C189 MD500 RC Helicopters add optical flow positioning.Product List:Color box packaging * 1Helicopter * 1Main seat remote control (left and right hands can be interchanged) * 1Instructions * 1USB charger * 1Main propeller * 5Tail propeller * 17.4V 1200mah battery * 1(Optional)/7.4V 1200mah battery * 2(Optional)Screwdriver * 1Hexagonal wrench * 1Soldiers and firearms are not included, for display only. Product Material: PA PCProduct battery: 7.4V 1200mahRotor diameter: 320mm Body length: 335mm Height: 126mmMotor: Double brushless motorRemote control time: 15 minutesCharging time: 90 minutesRemote control distance: 150-200m Product highlight: Adopting a single propeller without aileron design, 6-axis electronic gyroscope for stability enhancement, and incorporating a barometer for altitude control, hovering at height, add optical flow positioning, more stable flight and easier control! Long battery life! The appearance is scaled down according to the actual aircraft, which can not only control flight but also serve as a decoration.Color: camouflage/military green/black all with missile decoration (missile rack and screws need to be assembled by the customer), red and white dual color matching/painted by the US Coast Guard (without missile decoration) Function Introduction:1. No aileron design, using aerodynamic principles to design propellers to provide strong power and body self stability. 6-channel variable pitch structure design, using a 6-axis gyroscope for ultra stable flight;2. Equipped with a standard remote control for the main seat, providing more precise control and a better feel;2 pairs of brushless motors, with stronger power, good outdoor wind resistance, and longer service life;2. Barometer height setting, optional optical flow positioning, stable flight;3. Modular battery, intelligent power management system, easy and fast installation, effective protection of the battery, and longer service life;4. Special effects such as ascending, descending, advancing, retreating, flying to the left, flying to the right, rotating to the left, rotating to the right, flying along the route, and brushing the pan;5.6G mode, using a 6-axis gyroscope, stable flight, especially suitable for beginners in flight;6. Low voltage alarm, locked rotor protection, loss of control protection, large and small rudder conversion, one click takeoff, one click landing, and other functions;7. Equipped with a dedicated USB charger for fast and stable charging;