Digital 1: 32 cars run on 1: 24 scale track. The power supply for the D132 system is 14.8 volts and 3.5 amps. Carrera D124, D132 and Evolution use a common track. Aside from the lane change pieces designed for digital, the track is compatible with all three systems. If upgrading from analog to digital all straights and curved pieces from an analog set will be compatible with your digital layout.