The BK-404 is an 8K HDMI matrix featuring 4 HDMI inputs and 4 HDMI outputs. It also functions as an audio extractor, providing audio output via an optical port and an L/R port with a 5-pin Phoenix connector. Compliant with HDMI 2.1 and HDCP 2.3 standards, it supports a video bandwidth of up to 48Gbps. The matrix supports video resolutions up to 4K@120Hz 4:4:4, 8K@30Hz 4:4:4, and 8K@60Hz 4:2:0, with HDR10+ and Dolby Vision pass-through. Additional features include VRR, ALLM, QMS, QFT, and SBTM support. It can downscale 8K resolution to 4K and 4K resolution to 1080p. Control options include front panel buttons, an IR remote, RS-232, and WebGUI. Robust build with a plug and play installation. Perfect for commercial and personal setups.