Add hdmi and dvi video as well as audio and gigabit ethernet connection ports to a laptop computer through a single usb 30 port the usb3sdockhd universal usb 30 laptop docking station with dvi hdmi audio and ethernet adds dual video outputs headphone and microphone jacks as well as gigabit ethernet and additional usb 30 and usb 20 ports to a laptop computer all from a single device and over a single superspeed usb 30 connection offering flexible dual video combinations right out