Description:Our villa video door phone outdoor unit is part of our analog 4-wire video door phone system. Our system consists of at least 1 indoor unit and 1 outdoor unit. It can be expanded to 2 outdoor units and 4 indoor monitors. Every outdoor unit in this system can be connected to 4 indoor monitors. And every outdoor unit can control an electric-lock.Our model P1 is a metal housing HD camera outdoor unit with white LED for night vision. For all our outdoor units, we chose HD camera to display good images for users. Moreover, this camera has back light compensation function. In most cases, if visitor stands in front of the camera and the illumination behind the visitor is strong, the visitor will looks dark in the monitor. With our back light compensation camera, the will visitor will not became dark and user can see the visitor clearly. Specification:Resolution700 TVLViewing angle70° Outline dimensions129*54*40(mm)Power consumption:Standby 10mAOperating 80mAPowerDC from monitorStorage temperature-40-70℃Operating temperature-20-60℃