"Switch between 4 monitors and 1 computer or between 4 computers and 1 monitor. You can connect 4 Monitors to 1 CPU or 4 CPU to 1 Monitor. By means of pressing a button on the front, the wanted computer or monitor is selected. Perfect for connecting a digital projector or for the purpose if you have single monitor between 4 PCs and want to operate them one by one. High quality rotary switch no power required. Female connectors with gold-plated contacts. Fully shielded metal case with anti-skid feet. Up to 1920 x 1440@65Hz Resolution Power saving Mode Compact Form Factor"