It is a V9 video doorbell camera that can be set at the main door of the house for home security. It has a camera and supports WiFi so from inside the house you can easily see the main door outside if someone knocks. When a visitor presses the doorbell, automatically captures 2 images of the visitor and saves them to the cloud. You can view any past photos using the APP. It comes with voice change function and supports multiple mode switch so it will be easy to deal with unfamiliar visitors. It supports a maximum 128G memory card.