4 Port VGA KVM Switch With Audio & Mic: USB VGA KVM switch provides a cost-effective way to share one USB keyboard, USB mouse, and VGA monitor to control 4 computers.Supports Audio speaker and microphone switch and output. Higher Definition Output:JideTech USB KVM switch supports high-definition image and supports maximum resolution up to 2048 * 1536, Support DDC and Automatic Identification high quality output. Easy to Use:Plug and play without Adapter.With a USB-hub ports for sharing external hard drives, printers, scanners, etc. High Compatibility:Support Windows 98SE/ME/2000/XP/2003 Server/Vista, Linux, or Mac OS.The high-quality new chipset,effectively reducing the computer crash, mouse and keyboard freezed ect undesirable phenomena. 100% Satisfaction Guarantee:4 Pieces KVM cables included.Life Time Tech Support and 1 Year Warranty;If there is any problem with the KVM Switch received, please feel free to contact us through email.