[RESOLUTION & COMPATIBILITY] Supports up to 4K@60Hz (4:2:0) and 4K@30Hz (4:4:4). If your source device does not output 4K@60Hz (4:2:0), lower the resolution to 4K@30Hz or 1080P for proper signal processing. Compatible with HDMI 1.4 and HDCP 1.4. Note: Does not support eARC. [DUAL AUDIO EXTRACTION] Extracts audio from an incoming HDMI signal and routes it to an external sound system via Analog RCA and/or Optical (SPDIF) outputs. Important Note on RCA: Analog RCA outputs support standard 2CH PCM stereo only (does not downmix 5.1Ch to RCA) and do not support TV remote volume/CEC control. [ARC AUDIO EXTRACTION & ROUTING] Takes audio from a smart display via HDMI ARC and routes it strictly through the Optical port to external audio systems. Please note: ARC mode requires manual engagement via the physical button on the unit, and settings must be re-applied if power is completely disconnected. [DIRECT CONNECTION & COMPATIBILITY] Designed for straightforward point-to-point setups (not compatible with complex daisy-chained splitters, multi-device decoders, and simultaneous soundbar routing). Ensure your source/TV is set to PCM / Stereo if your downstream audio gear does not support multi-channel formats. [AUDIO EDID MODES] Say goodbye to incompatibility issues using the built-in EDID switch featuring 3 modes: TV, 2CH, and 5CH, allowing you to match audio output formats to your specific display and sound system. Free Lifetime Technical Support: All J-Tech Digital products include a one-year manufacturer replacement warranty and free lifetime technical support from our customer support team located in Stafford, TX. Support is available from 9AM – 6PM CST, Mon – Fri. Contact information available on our seller page