The NetMedla MODCAW It 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 return! the video broadcast signal (or One Wiie Video'" installation. It mounts toa typical round 4 inch junction box and is viewed with a television tuner. Other (unction boxes from youi local hardware store may also be used after replacing the round base with another that has a 1/2 inch diameter hole foi the elbow bracket. Equlp-meni that doesnothaveaiuner,suchasa security monitor,Quaddlsplay.orDVR, will requlrea demodulator (any TV tuner device with a composite video output such as a VCR) to convert the video for its use.