720p, real-time two-way voice intercom, can use mobile phone to communicate with visitors, not afraid of opening the wrong door, not afraid of the embarrassment of someone visiting but no one at home When the device is connected to the Internet has electricity, you can use your mobile phone to view the outdoors online, whether you are overseas, on a business trip, or on your way to work You can also capture video The 166 visual lens has a large field of view can almost see the entire door Perfect for home, office, guest room, hotel, hospital, etc External SD card slot for easy setup Support PIR motion detection, someone stays within one to two meters in front of the door for 5 seconds to trigger motion detection, automatically notify the mobile phone APP, the anti-thief effect is good, it can also effectively protect the safety of you your family It supports connecting 18 mobile phones, the whole family can add doorbells, support 3 mobile phones to view at the same time