... digital camera, color display, intercom & chimes video door viewer with digital camera (2.5" color screem)Features:1. ... 4-in-1 security door viewer,built-in digital camera, color display, intercom & ... 3. Hassle free installation replace the optical door viewer in minutes4. High sensitive camera,the visitor’ ... mm (7/8 in) video door viewer with digital camera (2.5" color screem)