0.3 mega pixel high resolution, 170 degree view angle. Can see a clear image outside door by pressing the button indoor. * 3.5-inch LCD screen digital peephole viewer with photo shooting function, fit for door thickness 42-72mm, door barrel 12-30mm. * Built-in 32MB memory can store 100pcs photos, cycled storage, can shoot a picture when pressing doorbell. After you press the touch button, you can see a big image on the display for safety. Photos can be viewed up/down. * Easy installation and safe operation. Powered by 3*AA batteries (NOT included). * Do-no-disturb function, doorbell function.