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Description:Dual talking, intercom, monitor and unlock Able to intercom with another indoor phone through management center 32 pictures recorded(optional) 4" LCD display, high resolution and reliability Decoder inbuilt in the indoor phone Parameter: Power input:220V±10% Power supply for indoor phone:12DV Power consumption: Static 0.5 W; working no more than 14W Working temperature: -20-+50 Degree Humidity: No more than 90%