Exost loop infinite racing set is "build & race without limit" Set. You can challenge the gravity with the vehicle's speed. The vehicles rechargeable ( 2 included) are remote controlled ( 2 included). vehicle's maximum speed is 8 km/h. The controller has backward, forward, & boost function: 5S high speed. There are 27 tubes included to give you maximum creative satisfaction. 4 challenges: 1 loop, 1 chicane, 1 jump zone, 1 overtake. The cars have led light which gives an excellent lighting effect while they are on the move. Play time is over 10 minutes. Requires 4Xaaa batteries for the remote ( not included). 2 recharging cables included. Instruction guide included.