The HDMI-MINIDPUSB allows you to connect a computer with mini display port and a spare USB port to a HDMI device such as HD TV. The mini DisplayPort transmits the video signal while the USB transmits the audio creating a complete HDMI source.Specification Active adapter Supports mini display port 1.1a input USB 2.0 input and HDMI 1.3b output Works by integrating mini display port video source and USB audio source Powered by mini display and USB Port Supports HDMI 225MHz/2.25Gbs per channel (6.75 Gbps all channel) bandwidth. Supports HDMI resolution up to 1080p Supports HDMI 12 bit per channel (36 bit all channel) deep colour Supports uncompressed 2 channel audio such as LPCM