Support video calls: Doorbell with built-in surveillance camera and doorbell, and Wi-Fi connection, allows real-time mobile phone and when guests come to visit, they can make video and voice calls For the whole family: The wireless doorbell camera can support 9 users to connect to the doorbell, but only 3 users can preview the screen at the same time at a time, and one user can speak to the doorbell at the same time Memory function: The doorbell supports AI detection function and memory function, supports three-day circular cloud storage, helps you get who visited you even when you are on a business trip Free disassembly: The built-in 800mAh doorbell camera comes with USB charging, no need to worry about the sudden battery, more convenient to use Convenient: The wireless doorbell allows you to hear when someone is at your door from any room in your house, and you can check the door situation via the APP on the mobile phone for more convenience and security.