The SV431USBDDM 4-Port USB (Universal Serial Bus) VGA KVM Switch lets you control 4 VGA, USB (Universal Serial Bus)-equipped PCs using a single peripheral set at high-definition VGA resolutions up to 1920x 1440. The included KVM cables provide a ready-out-of-the-box solution, while USB (Universal Serial Bus) Dynamic Device Mapping (DDM) & Display Data Channel (DDC) features work to significantly reduce switching lag-time & improve overall compatibility with your connected display & input devices, saving you time & money. For the next level in KVM performance, this VGA KVM switch integrates multi-core dedicated processing per channel & innovative, USB (Universal Serial Bus) DDM technology that enables you to quickly switch between connected computers with next-to-zero delay. DDM maintains a constant communication channel between your USB (Universal Serial Bus) peripherals & connected systems, avoiding the time necessary for your systems to re-recognize the devices when switching. In addition to faster switching, the KVM offers All-time Display Data Channel (Full DDC) technology to maintain proper display detection among connected systems, a simple one-touch button for hot-key selection & an integrated 2-port USB (Universal Serial Bus) hub allowing you to share additional peripherals. Backed by a Star Tech.com 2-year warranty & free lifetime technical support. The Star Tech.com Advantage Switch between devices with minimal lag through fast-switching DDM technology Instant setup & operation with included KVM cables Near universal compatibility with all USB (Universal Serial Bus) input devices through USB (Universal Serial Bus) DDM Ports