Never used, remained in box: Key Features: UltraHD 18Gbps 4x2 HDMI Matrix: 4 Input into 2 outputs switch - Supports highest video resolution up to 4K @ 60Hz, HDR Support, full 3D and HDCP2.2 complaint Full Audio Support with Audio Extraction function: PCM, Dolby True HD, DTS-HD Master Audio up to 7.1 Ch. Digital and analog Audio output with optical output and 3.5mm L/R audio out Full Matrix Control: Easily control which HDMI source is viewed at which of the displays. 1080p down-scaling function to down-scale 4K signal to 1080p in order to send optimum signal to both displays when connecting a 4K display and a 1080p display to the outputs. EDID Management, IR Remote & ARC function: Copy the EDID settings from any of your HDMI displays or choose from a wide selection of pre-programmed EDID settings set within the Matrix. Supports ARC (Audio Return Channel) function to send the audio from the display back to the audio output ports. Easily control the switching with the included IR remote controller. Full OREI Support & 1 Year Warranty; Product includes: Instructions manual, 4x2 HDMI Matrix, 100-240V world-wide power adapter, IR Remote