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Features:
Indoor Unit Size:φ109MM*96MMOutdoor Unit Size:φ54MMCamera Resolution:300K Pixel, 3X Digital zoom Display Screen:2.8 inch high-definition screenCamera view Angle:105 degree(Horizontal) with doorbellOperation Temperature Range:-10ºC ~ +55 ºC Operation Humidity:10%~95% Power:3pcs AAA batteries
2.8 inch electronic peephole viewer with 3X digital zoom & doorbell function