This USB VGA KVM switch 4 port allows you to manage 4 PC by one set of keyboard & mouse. Built with novel 2in1 USB VGA cable (the latest version). It's convenient for 4 computers to share a VGA monitor. Just manually switch computers for multi-tasking by pressing a button at your disposal. This Desktop VGA KVM support Plug and Play. Neither software nor AC adapter required. It's powered by the KVM cables. The VGA KVM Console compatible with Windows 10/8/7 / XP / Vista (32/64-bit), Mac, Linux, DOS, Win3, WINNT, Netware, and Unix. Also supports online games and DVR. Support resolution up to 1920*1440, Support DDC and Automatic Identification high quality output. Package includes: VGA KVM Switch*1, USB VGA cables*4, user manual*1 (Noted: pls connect the USB pigtail into the computer to transfer power supply and data) Yinker USB VGA KVM switch 4 port allows 4 computers to be managed on only one monitor, keyboard and mouse. The additional USB ports also allows you to share USB devices like printer, USB speaker or U disk for multiple computers.