The Model H511BID Bi-directional Modulator, Amplifier, Combiner is a combination modulator, amplifier and combiner. The H511BID creates a TV channel for a camera or other video device. Connect one of the Cat-5 cameras or any video device via the H110 wall plate. The H511BID is an all-in-one module that powers, injects, and distributes the created channel along with antenna or CATV throughout the house using the existing coax.