Smart WiFi Video Visual Doorbell, Support Night Vision & Video Message Leaving & Motion Detection & Multi-languages & 32GB TF Card 1. Doorbell function. 2. Indoor mirrors help you discover hidden dangers. 3. With one-click photo and video functions, you can immediately know who is coming from outside the door. 4. Near-infrared night vision technology, the picture is clearly visible. 5. Support motion detection. 6. Supports up to 32GB TF card. 7. Zinc alloy material, safe, sturdy and well-made. 8. Requires 3 AAA batteries (purchased by yourself), large and wide, easy to install. Note: Need to install the doorbell according to the thickness of the door: 1. When the door thickness is 35-60mm, select a 35mm screw. 2. When the door thickness is 60-85mm, select a 60mm screw. 3. When the door thickness is 35-110mm, select the 85mm screw. The package contains: Doorbell x 1 Peeping mirror x 1 Hanging board x 1 Screw x 6