Everything you need contained in the box to start racing including 4 cars, 2 steering wheel speed controllers, and track layout. Our kids race track set has two power modes, electric or 6xAA battery(not included), so your kids can experience the fun of racing at home or on the go.Quickly set up the track and start racing right away! Exciting high-speed racing car can reach a speed of about 300-370 mph on the electric race track, and you can fully feel the power and speed of the racing car in steering wheel remote control racing with sound effect.