... AA battery 3.Much better than traditional peephole; Easy to DIY,2.8 Inch Digital Peephole viewer Introduction ... 3M pixel CMOS,2.8 Inch LCD display • Easy to DIY: Install simply and quickly within 5mins, you ... can do it youself, so easy! • Much better than traditional peephole: Really and ... touch to show the outdoor easily, safely for anti-spy. 2.8 Inch Digital Peephole Viewer,Easy to DIY ...