This Selector is an Electrical Control Device Designed for Layouts of Any Scale by Atlas Model Railroad. FEATURES: 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 (ATLU0215)--not provided in package. Instructions provided on package. INCLUDES: One Controller 5/4/95sk kr8/9/01 ir/jl