Mt-viki Mt-471uk-l Automatic 4 Port Usb2.0 Kvm Switch Box 19201440 Bandwidth 250mhz USB2.0 port Support the super wide screen 4 port KVM switches using small pocket design, portable and easy to use. Support for DOS, Win3. X, Win95 / se ME/XP / 2000/98/98, WinNT, Netware, Unix, Linux. plug and play