4 in 1 out KVM switch: 4 PCs share 1 USB peripheral such as mouse, keyboard, flash drive, scanner, USB switch selector. One-key switching, no need to plug and unplug, 4 computers work together, work efficiency is greatly improved, suitable for mouse, keyboard, U disk, printer Easy to install: plug and play, no drivers required. Just connect the USB cable to the computer and the USB port of the product. 4K@60HZ high-definition picture quality, support desktop controller switching control Strong Compatibility: Compatible with most systems, such as for 10/8/8.1/7/Vista/XP and , Linux and Chrome OS. LED Indicators: Easily switch between 4 computers with the click of a button, LEDs indicate the active computer. Colour:black Material:plastic Package Contents: 1 * KVM switch 1 * Desktop Controller 4 * USB cable 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.