The smart visual doorbell features a 1080P picture effect, and adopts PIR human body infrared sensing, low power design and a large-capacity rechargeable battery, allowing the device to have long-lasting endurance and users to completely get rid of the trouble of frequent battery replacement, which is both cost-saving and environmentally friendly. The remote visual call function makes it easy to deal with visitors, allowing you to welcome guests even when you are not at home. The strong adhesive makes installation extremely convenient, making it your intimate and exclusive door guard.