This is a USB switch that supports USB2.0 Solve the problem of connecting four computers to multiple USB devices at the same time, avoid frequent plugging and unplugging, convenient work and no damage to the equipment. Plug and play, four-in and four-out, button switching design, you can switch to another computer to work with a light , no lag and more efficient. Easily copy files, transfer faster, copy files without plugging and unplugging, one-click to switch transmission, reduce the number of plugging and unplugging of USB disks and hard drives, and extend the service life of storage devices. Note:there is color difference between the object and the picture. Color:Gray Black Material:Metal Package Contents: 1 * USB KVM Switch 4 * Cable Only the above package content, other products are not included. Note: Light reflection 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.