This toy uses 3 AA batteries which are not included in the package. Make sure the batteries are in the right position and tighten the battery box cover. The buyer has also requested to Place the batteries with care while opening the product and placing the batteries follow the instructions given carefully. Please remove batteries immediately in case batteries are leaking or gets wet. Enables the STUNT CAR to change its direction automatically after bumping into an object or obstacle. This makes the STUNT CAR remain in constant motion without the need of a remote control.