The NetMedla MODCAM Is a self contained camera and modulator that converts the video signal to a selected television channel. It Is powered over the same coax cable that (etuins the video broadcast signal (or One Wlie Video"" installation. It mounts toa typical round 4 inch junclion box and is viewed with a television tuner. Other junction boxes from youi local hardware store may aba be used after leplacing the round base with another that has a 1/2 inch diameter hole foi the elbow bracket. Equlp-menl that doesnothavea tuner,suchasa security monitor,Quaddisplay,orDVR, will requirea demodulator (any TV tuner device with a composite video output such as a VCR) to convert the video (or its use.