... 5 inch color LCD door phone 2.Connection: four-wire, polarity 3.Connection: 4 wire ,polarity Video Door Phone with Intercom Between ... 78 degree or 92 degreeMin illumination:0.1LUXSystem:CCIRConnection: 4 wire ,polarityOut put: 75Q/1V(p-q)Warking temperature: -35 ... inch color LCDImage last: intercom 150 seconds manitor 30 secondsConnection: four-wire, polarityDimension: 22.5*20.6*5CMPacking: 29.8*28.7 ...