Key benefits Flexible access: three unlocking methods—fingerprint, password, or mechanical key—so you always have a reliable way in. Use fingerprint for fast, hands-free entry, a password when sharing temporary access, or the key as a fail-safe. Better privacy and security: the lock’s input is designed to be invisible to onlookers, protecting PIN entry and biometric use from shoulder-surfing or casual observation. Fast, convenient entry for daily use: the inner handle stays normally open for one-press access, and an audible mode-change tone confirms status so you can enter quickly without pausing to check the lock. Core functions and features Three unlocking methods: fingerprint, numeric password, and mechanical key for backup access. Peep-proof input: password and fingerprint operations are designed to be hidden from view to protect privacy and increase security. Normally-open inner handle: the interior handle remains in an open position for quick, single-action exit and entry when appropriate. Mode confirmation sound: the lock emits an audible tone when modes change, helping you confirm lock state without visual inspection. Reversible installation: no specific left/right orientation required, making installation suitable for both left- and right-handed doors and simplifying fitting. Why customers choose this lock Solves common access problems: eliminates lost-key scenarios through biometric and PIN access; provides a mechanical key for redundancy. Reduces privacy risks: invisible input helps prevent unauthorized observers from learning passcodes or access patterns. Saves time in frequent-use situations: normally-open inner handle and audible confirmation make daily entry faster and less disruptive. Practical applications Bedroom or interior apartment doors: add biometric convenience and privacy without changing exterior hardware. Home office or study: control secure access to sensitive spaces while keeping quick, convenient entry for household members. Storage room or supply closet: use fingerprint or PIN for frequent authorized access and the key as an emergency backup. Compatibility and installation notes Designed for indoor door use. Reversible design fits left- or right-hand orientations; installation does not require a specific direction. Check your door hardware and mounting requirements before installation to ensure compatibility. What this product delivers Multiple reliable entry methods (fingerprint, password, key) Peep-proof, privacy-focused input Quick-access normally open interior handle with audible mode confirmation Flexible, reversible installation for both left- and right-handed doors This indoor smart fingerprint lock provides practical, privacy-minded access control for interior spaces where convenience, security, and simple installation are priorities.