... support 1 year CE, FCC, RoH Digital Door Peephole Viewer,2.8 inch LCD, Door Camera Viewer, 2xAAA batteries support 3500 peepes, Home security, ... mounting panel with screws on the inside of door. Step4: Install LCD viewer and connect the cable, then fix the small ... of AAA batteries. Step 6: Drive it! Digital Peephole Viewer,2.8inch LCD Screen, Clear image&Wide angle, Night version, Digital Door Viewer