This is a 1-gang, in-wall HDBaseT transmitter that sends a local HDMI source to a remote display over a single Cat cable. It supports 4K UHD signals up to 35m (or 1080p up to 70m) and passes through IR and RS-232 control signals, and can be powered remotely (PoH) from a compatible HDBaseT receiver, removing the need for a separate power supply at the transmitter end. It's aimed at installers extending an HDMI source into classrooms, meeting rooms, huddle spaces or similar remote input locations, typically paired with a matching HDBaseT receiver such as the RX-35-POH.