This very handy little device allows up to 4 users to share a USB peripheral without the need to constantly swap cables or set up complicated network sharing software. It\'s ideal for sharing a printer or scanner in a small office environment. It\'s also great for use at home if you have multiple PCs or Macs. Please note: this switch requires manual control to select the active port (using hotkeys or push buttons). It does not \'automatically\' switch between ports.