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Description:Features: 1) Single household system video inter-phone 2) Dual talking, supervising 3) Intercom and remote unlocking 4) Camera in door station can provide clear picture even in nighttime Parameters: 1) Power input: 220V ± 10% 2) Power supply for indoor phone: 12DV 3) Power consumption: static 0.5W; working no more than 14W 4) Working temperature: -20-+50 degree 5) Humidity: no more than 90%