This biometric door knob integrates fingerprint recognition technology with smart home connectivity through the Tuya platform, offering a keyless entry solution for residential and commercial spaces. The unit is constructed from a zinc alloy body with a contemporary black finish, providing durability and resistance to daily wear. An optical fingerprint sensor captures and stores up to 50 user profiles, enabling quick and accurate access without physical keys. The device operates on four AA batteries (not included), with a low-battery indicator alerting users to replace power sources in advance. The fingerprint module processes data in under 0.5 seconds, ensuring smooth entry even in low-light conditions. Beyond fingerprint unlocking, the lock supports remote control via a dedicated mobile application. Through the Tuya Smart app, users can generate temporary digital codes for guests, monitor lock activity logs, and receive real-time notifications on door status. The app is compatible with both iOS and Android systems, and the lock can be integrated into broader smart home scenes through Tuya’s ecosystem. The knob design follows a standard door preparation size for most residential doors, making installation straightforward with the provided mounting hardware and instruction guide. The exterior handle features a smooth cylindrical grip, while the interior side retains a manual thumb-turn for emergency egress. The lock’s durability is reinforced by an IP54 rating against dust and splashes, suitable for covered outdoor applications such as apartment entrances or office side doors. The absence of keyholes eliminates the risk of lock picking, and the mechanical key override (included) provides a failsafe option when batteries are drained. Power efficiency is enhanced by the sensor’s standby mode, which extends battery life to approximately six months under normal usage. The black finish resists fingerprints and smudges, maintaining a clean appearance over time. This door lock is particularly suited for homeowners seeking to modernize entryways without extensive rewiring, as well as for Airbnb hosts wanting to manage guest access remotely. The price point reflects a balance between advanced features and affordability, making it an accessible upgrade for bedrooms, private offices, or rental units. The tactile response of the knob is well-calibrated, and the app interface offers clear navigation for assigning user permissions. While the lock does not include Wi-Fi directly, it connects via a Bluetooth bridge to the Tuya hub for full remote functionality, ensuring stable performance in typical home environments.

The product delivers reliable biometric authentication with smart expansion capabilities. The manufacturing tolerances are consistent, with the latch mechanism operating smoothly across repeated cycles. For users who prioritize convenience and security in a compact form, this lock provides a practical solution without compromising core functions. The affordable pricing further enhances its appeal as a value-oriented entry point into smart home security.