Multimethod smart door lock designed for flexible, reliable access control Key benefits Multiple unlocking options to fit every household and situation: APP, mechanical key, card, password, fingerprint, and optional 3D face recognition. Virtual password function protects privacy by allowing users to enter extra digits before or after the real password to prevent prying eyes. Broad compatibility with door thickness from 40 mm to 120 mm, making the lock suitable for most standard interior and exterior doors. Mechanical key and card backups reduce the risk of lockouts and ensure access in power or network interruptions. Main functions and features Unlocking methods: APP control for remote management, mechanical key for manual override, card and password entry for simple access, fingerprint for fast biometric unlocking, and optional 3D face recognition for contactless, hands entry. Virtual password: enter random additional digits around the real password to conceal the true code from onlookers. Installation compatibility: supports doors with thickness between 40 mm and 120 mm, allowing straightforward replacement of many existing locks without major modifications. Family friendly: multiple user credential types let each household member use the method they prefer. Practical use scenarios Family home: Parents and children can use fingerprint or password for daily access, while visitors or maintenance staff receive temporary card or password access. The virtual password adds privacy when guests are present. Rental or shared housing: Assign card or password access to tenants and manage mobile APP permissions for short term changes. Mechanical key provides a reliable emergency option. Small office or room access control: Use fingerprint or APP management for staff, and optional 3D face recognition for a hands entry point in busy areas. Why choose this lock Provides flexible, layered access methods to suit different users and situations without sacrificing privacy. Fits a wide range of door thicknesses for easier installation and replacement. Virtual password and biometric options increase everyday convenience while reducing exposure to shoulder surfing. Technical note Unlock methods: APP, Mechanical Key, Card, Password, Fingerprint, 3D Face Recognition optional Compatible door thickness: 40 mm to 120 mm