Use this foot switch to replace any keyboard shortcuts or key combinations to control your computer easily and quickly.It can be used for playing games, factory testing, instrument controlling, etc.Use USB foot switch to control your computer with any of your feet.It is equivalent to a standard HID USB keyboard.Pre-program key or key functions on the foot pedal by software.Allow to connect more than one switch to your computer by USB ports. you can achieve multi key shortcuts functionCompatible with Dos / Windows 2000 / XP / Vista/Win 7, , LinuxDimension (L x W x H): . 4 x 2.5 x 1.5 inch / 10 x 6 x 4 cmCable Length: . 67 inch / 170 cmMaterial: PlasticPackage Contents:1 pcs Foot switch1 x CDOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.