The AV Pro AC-EX40-444-T and AC-EX40-444-R Transmitter/Receiver with Power Supply are universal audio/video transmitters that use HDMI inputs and outputs. Specifically designed by AV Pro, these models offer seamless transmission of audio signals for a high-quality audio experience. Perfect for connecting various devices in a TV, video, and home audio setup, these transmitters are reliable and versatile for a range of audio equipment.