IBL integrated backlighting with digital display, high quality clock module which functions with a 12v input and 5v input. This powers the backlighting and the digital display. The clock is ready to be installed and adds much more realism to your simulator main instrument panel. This chronograph clock looks great when illuminated and is a must have for Boeing MIPs. Instructions included. ( see product data sheet, near price, on this page, for wiring details )