Control your computer with your foot Made of high quality plastic et metal, very durable Pre-program key or key combination on the foot pedal by software Use the OS built in HID drivers, dont need do the driver-instill-ting More than 100,000,000 times long life Plug and play, no driver is required, easy to use Can connect more than one switch to your computer Conform USB 1.1 free drive HID (Human Interface Device) perfect for playing games, also suitable for factory, test, instrument control and disabled, etc Description: Color: Black Material: plastic Compatible with Dos/Windows 2000/XP/Vista/Win 7, Linux (Note: Snow Leopard is not available for this item) Length x Width x Height (Switch): 3.9 inch x 2.4 inch x 1.5 inch (10 x 6 x 3.7 cm) Length (USB cable): 77.8 inch (198 cm) Net Weight: 318g Package Contents: 3 x USB foot switch Only the above package content, other products 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.