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. 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 more than one switch to your computer by USB ports. you can achieve multi key shortcuts function with Dos / Windows 2000 / XP / Vista/Win 7, , Linux Dimension (L x W x H): Approx. 4 x 2.5 x 1.5 inch / 10 x 6 x 4 cm Cable Length: Approx. 67 inch / 170 cm Material: Plastic Package Contents: 1 pcs Foot switch 1 x CD Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.