1. KVM switch, which can be used to switch back and forth between 2 PCs with a set of keyboard and mouse, a monitor, and two USB ports (external USB devices). 2. HD-MI supports up to 4K/60HZ, USB is USB2.0 (480Mbs) standard, backward compatible with USB1.1. 3. The product comes with a switch button, and supports an external desktop button with a cable, which is convenient for users to choose freely 4. Compatible devices: all kinds of devices with USB protocol, such as HD-MI devices, mice, keyboards, U disks, printers, all-in-one computers, scanners, etc. 5. System support: Windows XP above system/Linux Fedora FC8 above system/MAC OS 10.6.2 above system 6. Plug and play, no driver required 7. Support external 5V 2A auxiliary power supply 8. Metal shell, heat dissipation effectively 9. Dimensions: 149.2 x 65.6 x 20.5mm