Fosmon HDMI ARC Audio Adapter | Audio Return Channel Audio Extractor for Home Theater Application | VHD-ARCA [Supports 1080p, 4K, 3D] - (Optical Output Works with ARC Capable TVs only) Extracts the digital audio signal from the HDMI ARC enabled display and outputs it to the S/PDIF Optical TOSLINK port Supports 4k resolutions at 24/25/30fps @ 30Hz | Supports 3D, 1080p resolutions at 60fps @ 120Hz Pixel Clock Rate is 340MHz max | Total TMDS Throughput is 10.2Gbps max Audio Formats supported are DTS-HD, Dolby TrueHD, LPCM7.1, DTS, Dolby Digital, AC3, DSD ARC Audio Formats supported are LPCM 2.0, DTS, Dolby Digital AC3