1、HDMI to HDMI audio converter, allows 2 HDMI sources to be connected to 1 HDMI display, and adds additional 3.5mm audio and spdif audio output ports. 2、Extract digital HDMI audio signal from 2 HDMI signal input to optical output and 3.5mm audio output. 3、Support HDMI switch 2 in 1 output. Support HDMI4k 30hz signal. 4、Two HDMI signal inputs can be freely switched to a display device that supports HDMI signal input. 5、Any high-definition signal source can achieve audio separation and independent output through optical fiber or left and right channels. 6、Support for HDR. Support 4K/30Hz resolution. 7、Video format supports 8bit YcbCR 4:4:4 with the highest resolution 4K/30Hz. 8、Support function, output TV return audio through optical fiber port. 9、It can realize audio synchronization and separate output. 10、SPDIF digital audio output supports for Dolby digital (AC3), and DTS supports 5 LED indicator lights. When the signal source or signal terminal is in working condition, the corresponding indicator light will turn on. Condition: 100% brand new Item type: HDMI Audio Extractor Material: metal Color: As picture shown Weight: Approx. 137g Input: HDMI x 2 Output: HDMI x 1, Spdif x1, 3.5mm jack x1 Resolution: Support up to 4K 30Hz, backward compatible HDCP: HDCP1.4, backward compatible, does not support hdcp2.2 Compliant with HDMI1.4, backward compatible Support color depth: 24/30/36/48 bit Bandwidth frequency: 25MHz-225MHz Support audio format: DTS-high definitio/for Dolby-True high definition/LPCM7.1/DTS/Dolby-AC3/DSD Manual control mode, convenient operation, energy saving and environmental protection Power supply: DC5V Maximum working current: 800mA Operating temperature range: -15 to 55 ℃ Size: Approx. 90x47x19mm/3.5x1.9x0.7in 1 x Audio Extractor 1 x Power supply cable 1 x Instruction