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1/4" color CCD,320 lines or resolution2 lux with 3mm fixed focus lens2-way voice communicationDoorbell button with microphone activation and backlit nameplateAdditional separate alarm/action box to control external devicesVandal-resistant, dust and water-resistantSimple, single-cable (twisted-pair) connection3 1/10"W x 6 2/5"H x 2 1/2"D
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