Use this switch to replace any keyboard shortcuts or key combinations to control your computer easily and quickly. It can be used for gaming, factory testing, controlling instruments, etc. Use a USB foot switch to control your computer with either foot. It is equivalent to a standard USB HID keyboard. Pre-program key or key functions on the pedal by software. Allows you to connect more than one switch to your computer via USB ports. You can achieve multi-key shortcut function Compatible with Dos/ 2000/ XP/ Vista/ Win 7, , Linux Dimensions (L x W x H): Approx. 4 x 2.5 x 1.5 inches / 10 x 6 x 4 cm Cable Length: Approx. 67 inch / 170 cm Material: Plastic Package Contents: 2 x Foot Switch 2 x Disc Only the above package content, other products are not included. Note: Light shooting 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 +/- 1-3 cm.