... Model: PST-VD906C Standard package includes:1 x 7" Color TFT LCD Screen Monitor1 x outdoor camera1 x Wall Mounting Bracket ... extra charge), which can monitor, intercom, unlock and call other indoor monitors.Feature: 7" high resolution color TFT LCD panel display, with ... "Monitor key" for 5 seconds, click "Indoor Call key" to select the melody, then, click "Monitor key" to confirm. 7" TFT LCD wired ...