Controller for 16 solenoid accessories. LED's show the settings for turnouts and signals. The Keyboard has coding switches for setting the Keyboard address (1-16). The last valid turnout and signal settings are stored in memory after the layout's power is shut off. The Keyboard can be connected to Control Unit or another Keyboard or a Memory unit. Dimensions 135 x 120 x 80 mm / 5-5/16" x 4-3/4" x 3-1/8".