Features: 1.You can use 1 set of keyboard and mouse and a monitor to control 4 computer hosts and USB devices, which greatly saves equipment costs and brings you a good experience. 2.High?definition 4K visual enjoyment, the switcher supports up to 4K 30Hz (3840x2160), which makes the image display more delicate and lifelike, brighter colors, and more agile. 3.Automatically adapt to the screen resolution, can automatically adjust to fit the screen. The work indicator shows that it can easily identify the computer being connected. 4.No power supply, no drive, plug and play, no need to turn off the KVM switch and the host computer, USB devices, etc., you can add or remove devices at any time. 5.Use a special interface to replace the traditional cumbersome USB?B interface, so the switch body is lighter and smaller, compatible with a variety of computer systems. specification:Item Type: KVM Switch Material: Iron Shell Support Protocol Standard: High?Definition Multimedia Interface1.4 HDCP 1.2 Input Interface: High?Definition Multimedia Interface Output Onterface: High?Definition Multimedia Interface Resolution: 4K30Hz Transmission Distance: Input 10M, Output 10M Maximum Data Rate: 10.2Gbps Impedance: 100 Temperature: -5-70 Humidity: 5%-90 PackageList:1 x KVMSwitch 4 x Connection Cables 1 x Desktop controller