Smart door locks allow for the combination of various authentication methods to suit specific needs, adding an extra layer of security during critical moments. While ensuring everyday convenience, they also provide more reliable protection for specific scenarios—such as living alone at night or being away for extended periods—making your sense of security both adjustable and fully under your control. Multiple door opening methods, you can use fingerprint, IC card, password, mechanical key, mobile APP to open the door, which can bring you more convenience in opening and locking the door, bringing ease and pleasure to tedious life. You can also use the mechanical key and Bluetooth APP to unlock the door. Applicable for both left and right-handed doors, an ideal alternative for any standard single cylinder American door lock, such as apartment, residence, office, etc. Stay powered with four AAA batteries and a backup USB C port to functionality even during outages. All it need is just a small screwdriver, about 15 minutes you can install a smart lock for your home or office. When you forget to replace the battery and cannot open the door, USB emergency power can help you., Manufacturer: ARUNASC