NO.1  32pcs ring tones, avoid customer disgusting single ringbell,like dingdong.
NO.2   Touch panel.,like use iphone.
NO.3   Infrared night vision function,even though in the dark night,you can see the visitror’s photo clearly, nomatter who is friends or stranger.
NO.4  2 million pixels automatic camera,make sure the picture is clear enough.
NO.5  24 hours stand by for eight monthes with only 4 AA batteries.,saving power and environmental friendly.
NO.6  3.5" LCD color diaplay ,replacing  small traditional peephole  and  black and white display..
NO.7  256SD card can save 600 pcs photoes.
NO.8  fit any door 40-110MM thick and barrel hole 12-22MM