Features: *Indoor monitor supports monitor, visual intercom, unlock, hands-free, and don,t disturb function. It can also take pictures and record videos, max to support 64G TF card. *Outdoor camera has rainproof function and automatic infrared night view, which can provide with clear sight at night. *When coming a new visitor, it will call you automatically to remind you or send you missed visitors snapshots. *Remotely unlock functions: householders don't have to run to the door you can remotely unlock by the phone APP or unlock by the indoor monitor directly. Support unlock time delay. *Support real time video and audio chat with visitor by indoor monitor or phone APP. *Can check visit records, you won't miss any important visitors. *Support remote access on for Android/iOS phone APP, including remote unlock, monitor, intercom, and snap pictures or record videos. One WIFI doorbell can support up to 8 APP user terminals. *You can monitor what happened in front of your door anytime anywhere and you can snap pictures or record video with indoor monitor when youre at home or into your phone when youre outside as evidences or souvenirs. *Compatible with DC 12V NO/NC electric lock (not included). *Volume, brightness colorful adjustable. Come with power supply terminal wire, user can install by themselves.