UQ Four Track Panel Mounted ControllerFour track controller designed to sit inside a control panel. This controller has four rotating dials to control the speed of four seperate locomotives and a DPDT switch on each circuit to control the direction of travel, you can also switch it to the center position to cut off the power to the track. The following power supplys can be used to power this unit. GMC M1 Cased Transformer GMC T1 Open Transformer GMC WM1 Wall Mounted Transformer TECHNICAL