The converter is powered by a 5 VDC 2A AC power adapterThe AC adapter has a 46" long cordThe converter measures 5 1/16" x 3. 5" x 1. 0"The converter accepts a low-resolution 480i legacy input and upscales it to a high-resolution 720p or 1080p HDMI digital signal.The HDMI input allows the converter to perform upscaling on low-resolution HDMI signals, so you can view them at the full 720p/1080p resolution supported by your TV.