1、Wide Visual Range: This WiFi smart door bell has a wide viewing range, with 166 degree viewing angle, ensuring that every corner of the home is observed. 2、Clear Viewing Image: This wireless door bell has high definition image, providing you with a clear and delicate viewing experience, clearly identifying visitors. 3、IR Alarm Function: The smart visual door bell has an infrared alarm function, timely remind you have a visitor or potential risks, which convenient and reliable. 4、Battery Powered: This wireless door bell is powered by 2pcs lithium batteries (not included), the battery can be replaced, making it convenient to use at any time. 5、Easy Installation: Equipped with screws, bolts, screwdriver, and accessory, this wireless security door bell is easy to install and remove, suitable for home use. Item Type: WiFi Smart Door Bell Material: ABS Battery Type: 2 x Lithium Battery (not included) 1 x WiFi Door Bell 4 x Screws 2 x Bolts 4 x Expansion Screws 1 x Screwdriver 1 x Accessory 1 x User Manual