1. 4 Port-- Used to share 4 USB or for -compatible peripheral devices(like scanner, USB hard drive or other USB devices) without having to constantly change cables. (Using only 1 set of keyboard, mouse and monitor to control 4 PCs)<br> 2. Mouse Keyboard Sharing-- Using only 1 set of keyboard, mouse and monitor to control hosts Laptop.<br> 3. Material--The shell made of aluminum alloy material, , heat-, it expands the life of the USB switch.<br> 4. Easy to operate--Plug-and-Play design be easier to use, no app is needed.<br> 5. Others--Compact design reduces office expenses and saves a lot of space.<br> Four hosts share a set of display / keyboard and mouse to improve work efficiency.<br> 4K@60HZ clear picture quality. Support 4Kx2K high-definition resolution clear and detailed display.<br> Easy switching, neat desktop. High-speed transmission without lag, no loss of picture and sound quality.<br> USB transmission technology mouse and keyboard without delay.<br> Metal shell, wear-, high temperature , good heat dissipation.<br> Material: Metal<br> colour: black<br> Package Contents:<br> 1 x KVM Switch<br> 1 x Desktop Controller<br> 4 x USB cable<br> 1 x Chinese and English instruction manual<br> Only the above package content, other products are not included.<br> 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.