5-in-1 Unlock: Our video doorbell has 5 unlocking methods. You can unlock by password, fingerprint, IC card, app, and monitor. It is very convenient and flexible. 5 passports are included in the delivery. So you can open the door at any time. ABOUT THE CABLE: The monitor must be connected to the doorbell with 4 wires. We provide a 3m 4-wire cable for each doorbell and a 1.2m external power adapter for each monitor. You can extend the distance with a 4-wire cable. The main monitor can be connected to your home Wi-Fi network. Allows you to view visitor information on your mobile phone at any time. Motion Detection: The wireless video intercom is equipped with motion detection: when visitors press the doorbell or the motion detection is triggered, the doorbell camera will automatically record videos or snapshots and save them to the additional micro SD card (32G card included). at home every day. You can watch it on your mobile phone or monitor. 7 inch Touch Monitor & 1080P Doorbell: 7