4K In-Line HDMI Controller / The PureTools Series - High Quality AV Products for Commercial Applications / 4K 18Gbps HDMI CEC and Relay Controller | PureLink | English
Amazon.com: BlueRigger HDMI CEC Less Adapter (4K UHD, ARC, Ethernet, Male to Female CEC Blocker) - Compatible with HDTV, TV Stick, Chromecast, Nintendo Switch, Xbox, PS5, PC, Soundbar : Electronics
Understanding HDMI-CEC frame : Tiny Electron's Blog