SIIG USB to DVI/VGA Multi Monitor Video Adapter (JU-DV0211-S1) Supports standard and 16:9 and 16:10 widescreen formats Supports Hi-Speed USB 2.0 480Mb/s data rate Connect up to 6 adapters in one system Compliant with Universal Serial Bus 2.0 Specification Supports analog video output interface DVI-I Works with VGA monitors with included DVI-to-VGA adapter Display modes Primary, Extended, Mirror Supports 60Hz and 75Hz monitor refresh frequencies