This is a Carrera Digital 124/Digital 132 Control Unit! The control unit acts as the new core and allows you to program braking performance, power (maximum speed), tank capacity, pit stop functions, and pace car functions. Contents of the box include: - 1 Digital 124/Digital 132 Control Unit - 2 end pieces Can be used with Digital 132 and Digital 124 systems. Recommended for ages 8 and up.