Features: Indoor flight: Double propeller fixed altitude remote-controlled helicopters are suitable for indoor flight without worrying about weather or space limitations.Full scale operation function: The helicopter has full scale operation functions of ascending, descending, advancing, retreating, turning left and right, and fixed height, making the operation simple and flexible.Height fixing function: The helicopter is equipped with height fixing function, which can stably fly at a certain altitude, reduce operational difficulty, and improve flight stability.Remote control operation: By using the remote control, the flight of the helicopter can be remotely controlled, adding fun and challenge.Suitable for beginners: Double blade fixed altitude remote controlled helicopters are easy to operate, suitable for beginners to practice flight skills and improve flight experience.