With this high-quality video door phone system, you can distinguish expected visitors from door-to-door bagman. It features the LCD screen which enables you to view the callers before letting them in. What’s more, the built-in infrared illuminators assure nighttime viewing without external lighting. Just pressing a button on the monitor, you can unlock the door remotely. If you have security concerns, get yourself this video door phone, it maximizes your personal safety.