This 4way switch electronically switches VGA port with a press of button. You can share a VGA monitor with up to 4 PC or Mac. No mechanical contact is involved. That means reliable switching and long life. You can connect up to 330Ft (100m) VGA cable. Switch monitor with just a press of button Max resolution : 2048 x 1536 / 72Hz Cable length : Max 330Ft (100m) Power supply included