This control provides the simplest way to wire and control tricky reverse loops, wyes, and turntables. It has reversing switches for two mainline cabs plus a switch, selectable by either cab, for directional control on reversing loops, and so on. Cab Switches (Red--for Cab A and Cab B) Cab Selector Switch (Green) Direction Switch (Gray) Couples with #215 Selector (ATL-215, not provided in package) Instructions provided on package Atlas Reverser and Direction Controller