... Key Features 1) New Patented Door Peephole Viewer with 2.5 inch TFT LCD Screen2) 1.3Mega Pixels ... again7) Simple 3 steps DIY installation8) Power Source: 2 AA batteries9) Certificate: CE, FCC, RoHS.Image ... doors that are 35~57 mm (1.38~2.24)wideAccessoriesBase flange, Tightening tool, Peephole, User ... manualSize146mm x 90mm x 30mmWeight0.4lbs or 180g 2) Packing list1) 1x Base flange2) 1x Peephole3) ...