Tek Republic TUA-400 USB 3.0 to 4K (Ultra HD) HDMI Adapter for PC & Mac Supports HDMI resolution up to 3840x2160 (Ultra HD 4K) @30Hz and 3440x1440@50Hz. 2560x1600, 2560x1440, 1080P at 60Hz. (USB 3.0 Connection required) Audio over HDMI when adapter is the PC's default audio device (except Mac) Connect up to six monitors Drivers are provided automatically via the Microsoft Windows Update mechanism with approved drivers forWindows 7, Windows 8/8.1. (Windows RT, Mac OS X and Linux not supported) Graphics Engine: Display Link DL-5500