Alpha Color Hands-Free 7.0-Inch Video-Intercom Monitor

7.0" (diagonal) Crystal Clear Color TFT (800 x 480) Video Screen Big front button controls for call answering (voice) and door release Uses simple 2-conductor non-polarized (loop) wiring Up to four (4) monitors can be called from a single call button (or 16 in VILLA mode) Easy Installation (optional desk mounting using SOB-UNI desk adapter)