This hdmi matrix 4 in 4 out supports resolution up to 4K 3840*2160@30Hz, 8KV ESD protection. Support Local LAN control from other computer by installing MatrixController This HDMI Matrix 4x4 routes 4 HDMI input source to share 4 HDMI output source. WHEN to switch OUT 4 for 3.5mm audio extraction, you will get the audio out. Mirror the samee signal to all output or independently direct individual input signals to each display for a personal customized HDMI routing matrix. This HDMI matrix supports resolution up to 3840*2160@30Hz and downscaling, 8KV ESD protection.After installing MatrixController, you can control the Matrix via another PC. HDMI Matrix switcher 4x4 fits for standard 1U 19 inch Cabinet/Rack. Compatible with windows Linux and other system,PCM, Dolby AC3, DTS5.1, DTS7.1 and DSD audio format. Support 5 ways switch,pannel button, IR,RS232, Lan or Web Gui. Package Included: 1 x HDMI Matrix switch 4x4, 1 x RS232 Cable, 1 x IR Remote, 1 x Rack ears & screws, 1 x Power cable & adapter, QR code for user manual and software. Arvitek 4x4 HDMI Matrix Switch 4 in 4 Out Rack Mount 4K@30Hz EDID + RS232 + LAN Port + Web GUI + 3.5mm Stereo Audio Extraction + IR Remote Control