You can use your hand as sensor, which makes it easier to control the helicopter for beginner and kids, and more stable for flying. Inductive suspension and collision protection, light weight, easy to fly with simple operation especially designed Boy Toy for beginner. It will cut off the power automatically when the fan blade is hindered, this will be more safe. Flashing light on the bottom of the plane helicopter, which is cool and provide you a special look. The helicopter also has rechargeable battery and charger. Features Light weight, good stability, strong material and fall resistance. Built-in battery, charge for 20 minutes, can be used for 5-8 minutes. Can fly indoors, bring you unlimited fun. With sensing function, when the toy senses close to the hand, it will automatically fly upward, ensuring safety and will not hurt the child. Specification Model: CY387. RC Helicopter Battery: 3.7V 75mah. Charging Time: 20min. Working Time: 5-8min. Size: Total Length of RC Helicopter: 18cm, Total Width: 3.5cm, Propeller Length: 16.5cm. Package weight: 117g. Packing List 1* Charging Cable, 1* RC Helicopter.