Guangzhou Geffen GF-HDMI0802/04/08 is a 4/8 input 4/8 output HDMI matrix, this matrix supports all HDTV resolutions with 12-bit color depth. and PC resolutions up to 4K@30hz. It supports automatic equalization of the longest line input, compensates for long-distance HDMI cables, and reduces the number of additional input signal processing devices required. This matrix is excellent for transmitting HDMI video and multiple digital audio signals to the display device through the HDMI cable.