GEFFEN PRE series EXT-HD-SL-444 is a 4-input and 4-output HDMI matrix that supports HDMI 1.4 1.3a, HDCP 1.3, and DVI 1.0 protocols. All HDTV resolutions that support 12-bit color depth include 1080p/60, as well as resolutions up to 1920*1200 for PCs. It supports automatic equalization of long line inputs up to 36 meters, compensates for long 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.