This product is a 2/4 port bi-directional HDMI eARC audio extractor switch that supports 4K at 60Hz. It can be used as an eARC splitter, eARC switcher, or HDMI switcher, and it supports various audio formats, including DTS-HD, Dolby-TrueHD, and DTS. The product also features a 3.5mm stereo, coaxial, and fiber audio output, and it comes with an IR remote control, a 5V power adapter, and a user manual.