This product is a combination 4-input, 1-output HDMI switcher and optical digital audio (S/PDIF) separator. It's housed in a compact body, but functions are assigned to all four sides, so careful placement and wiring may be required. Front: Indicators, operation buttons, infrared receiver Left side (viewed from above): Power, HDMI output Right side (viewed from above): Optical digital audio output, analog audio output Rear: HDMI input x 4 - There are scratches from rubbing, but this does not affect functionality (see photo 2). - You will need to separately provide a USB 5V micro USB charger for power. - Supports HDMI 2.0b 18Gbps, so it supports up to 4K 60Hz HDR. - Shipping is planned via Rakuraku Mercari Bin Nekopos. #SPDIF #HDMI selector