The USB421HS 4-to-1 USB (Universal Serial Bus) Switch Box allows for a USB (Universal Serial Bus) 20 device to be shared with up to 4 different computer systems without having to disconnect & reconnect the cabling everytime Push-button controls makes switching between computers quick & easy with additional keyboard hot-key switching & Windows based software also available With no external power Adaptor required & with its compact design the USB (Universal Serial Bus) 20 data switch takes up very little space & is easily portable Backed by a Star Tech 1-year warranty & free lifetime technical support Features Push-button hot-key controls or software for switching between computers Compliant with the USB (Universal Serial Bus) 20 standard with data transfer rates up to 480 Mbps Powered directly from the USB (Universal Serial Bus) port Compact desktop form factor design Plug-&-play compatible Barcode 0065030841214 Case Colour Silver Depth 101 cm Form Factor USB (Universal Serial Bus) Hub Height 19 cm Interface 5 x USB