The switcher allows four sets of PC/AT keyboard and EGA/CGA monitor to be connected to one computer. It has reset button and includes 5sets of Y cables & power adaptor. Note: Only one console can use the computer at a time. (Connectors: Switcher - DB25 Female; 1 Y Cable for Computer - DB25 Male to DB9 Male/Din5 Male; 4 Y Cables for Remote Console - DB25 Male to DB9 Female/Din5 Female)