UGreen 4-Port USB KVM Switch Box - Black | 50280 UGREEN - 4-Port USB KVM VGA Switch Box - Controls 4 computers with a single set of controls and display screen (mouse and keyboard). It is ideal for workstations, test stands, or anywhere that requires multitasking between computers. Conveniently for controlling multiple computers and provides a cost-effective way to share a USB keyboard, USB mouse, and VGA monitor to 4 computers at the same time. Portable and easy to use: 3 USB Type A connectors, 4 USB Type B connectors, 4 VGA IN connectors and 1 VGA Out connector. The 4-in-1 VGA KVM switch between four computers is controlled by the button on the top of the unit. 4 USB type B connectors not only for data transfer from the printer, but also for the additional power supply. So you don't need to plug any power into the VGA switch box. Full HD 1080p High Definition Output: UGREEN USB KVM switch supports high definition images and supports maximum resolution up to 1920 x 1080 @ 60 Hz, backup support 720P, 480P. Please note that this VGA switch only transfers video. For audio output, directly connect your speaker to the 3.5mm interfaces of the computer / PC. Wide compatibility: Windows 10/8/7 / XP / Vista (32/64-bit), Mac, Linux, Sun Solaris, DOS, Win3, WinNT, Netware and Unix. The VGA switch is also compatible with online games and DVR. Plug and Play: no need for power supply or software.