... easy operation and installation 3 3rd generation digital peephole viewer 4 door thick 25-110mm 1.Private mold,fashion Design ,digital ... pixels camera!8.Changing battery from side,no need to take off the DPV from door! 1. New Peephole Viewer with ... , SUITABLE FOR DOOR THICKNESS FROM 25~110MM!! 3.5" with door bell, video record, photo snapping,2.0M camera, digital Peephole viewer!! digital door camera