The 4K Series audio inserter allows you to insert stereo or multichannel surround sound audio signals through a digital To slink or an analog 3. 5mm input, giving you the ability to add digital or analog audio to an HDMI video signal. 4K HDMI audio embedder is fully compliant with the HDMI and HDCP 2.0 standards to ensure compatibility with equipment components. Feaatures: Embeds multi-channel optical (S/PDIF) or Line analog audio to HDMI output Analog audio supports PCM2.0 color: gray Material: aluminum alloy Optical audio supports LPCM 2CH, Dobly Digital 2/5.1CH, DTS 2/5.1CH Video resolutions up to 4K2K@50/60Hz (YUV444) HDMI 2.0b (18Gbps), HDCP 2.2 and DVI 1.0 compliant 10bits HDR (High Dynamic Range) pass through Supports HDMI High Bit Rate(HBR) audio pass through Supports CEC bypass Remarks: 1)this item listed is not a hdmi audio extractor. The toslink and aux port is for audio insert. 2)This is an entry-level HDMI audio embedder, there might some sync delay with video. Pls give it some tolerance. Package Contents: 1 x Audio Splitter Embedder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.