This HDMI KVM 2 port box help you realize one set of keyboard and mouse control 2 pcs share one monitor, max support 4Kx2K@30Hz source and displayer (Note: if you want this KVM support 4Kx2K@30Hz, please confirm all your devices are support this high resolution). switching between 2 pcs by button key on the panel, very convenient and quick, perfect for home using or office using or personal studio. with 4 USB 2.0 Hubs so that 2 pcs can share more USB 2.0 devices, such as printer, U-disk, scanner etc. You don’t need to install a extra power adapter to make the KVM working normally, the USB-B cables will provide enough power to the device. How convenient it is!. The metal casing makes it more resistant to pressure, and the item smaller than the palm makes it take up less space, more convenience for your work and life.