[Five unlocking methods] Support fingerprint, password, IC card, traditional key and Bluetooth APP unlocking to meet different needs and easily enter the house. [Bluetooth APP unlocking] Through Tuya/Smart Life APP, you can remotely unlock the door within the Bluetooth coverage without network connection, which is convenient and fast. [DIY installation design] Adapt to American standard doors (door thickness 1-3/8in to 2-1/8in, back distance 60mm/70mm), no wiring or drilling required, simple installation, suitable for home or rental house use. [Temporary password function] You can generate regular, limited or one-time passwords through APP remote control, and flexibly share access control permissions, suitable for family, friends, and tenants. [Virtual password protection] Supports up to 24-digit passwords, adds virtual password (irrelevant numbers) protection, and improves security. [High security fingerprint recognition] Adopts live biometric fingerprint recognition technology, anti-counterfeiting and anti-theft, ensuring that only authorized fingerprints can be unlocked. [Simple and stylish appearance] Zinc alloy shell, black, modern and simple design, suitable for various home styles. Notes: 1. Battery use: The product needs to use 4 x AAA batteries, which can be used for about 6 months under normal use. When the battery is low, the system will automatically remind you to replace it. 2. Confirm before installation: Please confirm that the door lock is suitable for your door type, especially the door thickness (1-3/8in to 2-1/8in) and the rear distance (60mm/70mm).<br><br>Notes: Bluetooth unlocking range: Bluetooth unlocking is only effective if the mobile phone and door lock are within the effective range. Please make sure that the mobile phone Bluetooth is turned on and paired normally. Avoid external force operation: Avoid operating the door lock with excessive force to avoid damaging the lock core or sensor. Door lock c