StarTech.com's Manual 4-to-1 VGA/SVGA Monitor Switchbox lets up to 4 computers share 1 monitor or 1 keyboard. Requiring no power supply, this switchbox is ideal to sit on a user's desktop and allow them to manually switch between active computers. Applications/Solutions: Four (4) computers share one (1) monitor. Requires four (4) VGA switchbox cables (MXT101MM, MXT101MMHQ, or MXT105MMHQ). Specifications: Ports: (4) to (1) High Density DB15 Female. Power Supply: Not required.