... video door viewer 1.built-in digital camera, color display, intercom&chimes 2.Hassle free installation ... in-1 security door viewer 2.built-in digital camera, color display, intercom & chimes 3. Built-in memory, ... 4-in-1 security door viewer,built-in digital camera, color display, intercom & chimes2. User-friendly design,so ... x 36.7 mm (2.4 in diagonal) Camera Color CMOS sensor, 0.3M pixel Built-in Memory ...