You will need this modulator if you want to connect a video signal originating from a camera or other video source to a normal TV set. The audio and video signal is converted into a UHF TV signal so that the signal can be received through the TV antenna input. In certain countries (consult your national telecommunications authority) it is legal to use this modulator as a mini transmitter by connecting a small antenna. This makes it possible to receive the signal from the video recorder or camera in another room of your home (range approx 30m, 98'). The kit comes complete with housing and an antenna connector.