StarTech.com 4-to-1 USB 2.0 Peripheral Sharing Switch - USB peripheral sharing switch - 4 ports

Quickly and easily share a USB 2.0 device between up to four different computers. The USB421HS 4-to-1 USB switch box allows for a USB 2.0 device to be shared with up to 4 different computer systems, without having to disconnect and reconnect the cabling every time. Push-button controls makes switching between computers quick and easy, with additional keyboard hot-key switching and Windows based software also available.

With no external power adapter required, and with its compact design, the USB 2.0 data switch takes up very little space and is easily portable.