Collision Protection The electricity will cut off automatically to avoid further damage when the aircraft is going to strikes objects. The safety of the flying toy including its soft propeller blades has passed the safety certification test CNAS-L4136. You don’t need to be too afraid when playing it because it will not hurt people if used correctly. Infrared Induction With stronger power and a more advanced infrared sensor, the ball will fly up automatically before landing, prevent from falling to the ground and getting broken. Rechargeable Built-in lithium battery, the flying ball is powerful and can be played repeatedly. Charge about 20 minutes can last for 8-15 minutes. The lithium battery capacity of the flying ball is 3.7, 100MAH. It is recommended to charge with the corresponding voltage, please try not to charge on the laptop. Features: Intelligent anti-collision sensor system--The bottom of the balls has a great sensor system, which allows it to change flying directions when getting too close to the obstacles, with no deadly crash. If you use the remote to control the flying ball, it will make it easier to operate. Warm Tips: Keep away from faces and eyes. Do not launch at people or animals. Propeller rotating at high speed, the hands cannot touch the propeller position, in order to avoid danger! Please keep our flying ball fully charged before first use and stop playing when it is on low battery. Make sure the flying ball is at shutdown status during charging.