USB2.0 (480Mbps) high-speed data transmission, can be used to connect mouse, keyboard, etc.Plug and play, no driver requiredSelect any one of the two HMDI input sources as the outputSupport external 5V2A auxiliary supply supports 4K/60HZKVM503 is a KVM switch, which can be used to switch back and forth between 2 PCs with a keyboard and mouse, a monitor, and two USB ports (external USB devices). supports up to 4K/60HZ, USB is USB2.0 (480Mbs) standard, backward compatible with USB1.1. The product comes with a switch button, and supports an external desktop button with a cable, which is convenient for users to choose freelyCompatible DevicesAll kinds of devices with HMDI. Mouse, keyboard, U disk, printer, all-in-one machine, scanner and other devices with USB protocolSystem Support Windows XP and aboveLinux Fedora FC8 above system OS 10.6.2 and abovecolor:Silver greyMaterial:Aluminum alloyPackage Contents:1 x KVM Switcher2 x USB Cable1 x DC CableOnly 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.