[DIY installation design] Adapt to 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. [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 . [Five unlocking methods] Support fingerprint, password, IC card, traditional key and Bluetooth APP unlocking to meet different needs and easily enter . [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. [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. 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 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)., Manufacturer: Akfldms