Ugreen 2 Port USB KVM switch box allows you to control 2 computers with only one set of controls (mouse and keyboard). It is great for workstations, test stands or anywhere multitask between computers is required. USB VGA KVM switch provides a cost-effective way to share one USB keyboard, USB mouse, and VGA monitor to control 2 computers. | Portable and Easy to Use: 2 USB Type A connectors, 2 USB Type B connectors, and 3 VGA connectors. The 2 In 1 Out KVM Switch between two computers is controlled by the push button on the top of the unit. 2 USB Type B connectors support not only for data transfer but also for the power supply. No external power required. | Higher Definition Output: Ugreen USB KVM switch supports high-definition image and supports maximum resolution up to 1920 x 1440. The adapter supports only for video output. But you can enjoy the audio through speakers from PC. | Wide Compatibility: Windows 10/8/7 / XP / Vista (32/64-bit), Mac, Linux, Sun Solaris, DOS, Win3, WINNT, Netware, and Unix. The VGA Switcher Box also supports online games and DVR. Plug and Play: no power supply, or software needed. | Important Note: Please make sure the VGA Input Connector 1 and USB B Connector 1 were plugged in the same Host. VGA IN1 and USB IN1 is corresponding. Do NOT support VGA IN1 and USB IN2 mixed insertion.