SODIAL(R) 2.4" Monitor Digital Door Peephole Viewer High Resolution Camera DIY Digital electric peephole, also called electric door eye The common peephole in anti-theft door consists of two concave and convex lens. Digital Electrical peephole plays an important role in home anti-theft door monitor and it is composed of digital camera, mainframe, display screen. High resolution video, picture pixels is 300000, clear image, LCD screen superior to traditional door-bell. DIY, only need 5 minutes to install