... support 1 year CE, FCC, RoH Digital Door Peephole Viewer,2.8 inch LCD, Door Camera Viewer, 2xAAA batteries support 3500 peepes, Home ... 1 Brief Installation Instruction:Step 1: Remove the existing door viewer, make sure the hole dia. 14mm at least.Step ... 2pcs of AAA batteries. Step 6: Drive it! Digital Peephole Viewer,2.8inch LCD Screen, Clear image&Wide angle, Night version, Digital Door Viewer