This fingerprint door lock integrates multiple access methods into a single handling unit, combining a biometric sensor, a touchscreen keypad, and a physical key override. The exterior shell is constructed from zinc alloy and ABS plastic, providing a sturdy feel while resisting minor impacts and surface wear. The fingerprint module uses semiconductor capacitive sensing technology, which reads the ridge and valley patterns of a finger to grant access. It can store up to 50 individual fingerprints, allowing for quick enrollment of family members or trusted users. The touchscreen keypad supports a passcode length of 4 to 10 digits, and a temporary code can be generated for guests or service personnel. The lock runs on four AA batteries (not included), and the low battery indicator will alert users when replacement is needed. In case of complete battery drainage, an external 9V battery can be used as a backup power source via the emergency port, or the physical key can unlock the door. The lock mechanism is designed for standard residential doors with a thickness between 35 mm and 55 mm, and the installation process requires only a screwdriver and a few minutes. The internal motor operates quietly and responds to fingerprint or code entry within approximately 0.3 seconds. Durability testing shows that the keypad can withstand over 100, 000 presses, and the fingerprint sensor is rated for at least 500, 000 touches. The surface coating resists smudges and light scratches, maintaining a clean appearance over time. The lock body does not include a Wi‑Fi or Bluetooth module, so it operates entirely offline; this eliminates concerns about network hacking or signal interference. The mechanical core uses a standard deadbolt structure to ensure reliable locking even when the electronic components are powered off. This product is suitable for indoor use in bedrooms, home offices, hotel rooms, and apartment doors where a balance of security and convenience is desired. It provides a straightforward upgrade from traditional keyed knobs without requiring complex wiring or professional installation. The price point makes it an affordable entry into keyless entry, offering basic smart lock functions without extra connectivity features. The operation is intuitive: place a registered finger on the sensor or enter the correct code, and the handle can be turned to unlock. When closed, the lock automatically engages, or users can set it to remain unlocked via the toggle on the interior side.

The lock delivers reliable, fast biometric authentication coupled with a digital keypad backup. The construction emphasizes practicality and ease of use, with no unnecessary frills that could complicate daily operation. Its compact design fits most standard door preparations, and the lack of subscription fees or app dependencies keeps long‑term costs low. Users receive a simple, effective solution for securing a door with minimal hassle.