52HZ Fingerprint Door Knob with Lock – Smart Biometric Door Lock (Matte Black)

Smart, Secure Entry with 52HZ Fingerprint Door Knob

Meet the 52HZ Fingerprint Door Knob with Lock, a matte black biometric door lock that blends sleek design with versatile access options. It embraces modern living: quick touch entry, app-based controls, and a trusted physical key backup, all on a compact, sturdy back plate designed for US standard doors.

Three reliable unlock methods, plus one-touch security

Unlock up to 50 fingerprints for family members or trusted guests. Use the companion app to add access, view unlock history, or set a privacy mode. Long-press the rear lock button for 3 seconds to engage Secure Lock and hear a voice prompt confirming the status. This combination supports bedroom, living areas, closets, or small offices without fuss.

• Fingerprint recognition responds quickly, enabling entry in about 0.1 seconds for most users.
• Physical keys remain as a backup option for scenarios where phones are unavailable.

Smart app control and essential features

The built-in app offers convenient management within Bluetooth range: add fingerprints/passwords, monitor unlock records, adjust volume, check battery levels, enable passage mode, and toggle auto lock / privacy mode. If the lock goes offline, revoke access via fingerprint before reconnecting.

• Passage and privacy modes tailor access when you need it.
• Auto-lock can be set from 5 to 60 seconds, adding an extra layer of security for busy moments.

Power, durability, and reliability

USB charging provides a convenient power option for emergencies. The lock is designed to perform across a wide temperature range (-22°F to 176°F) and withstands daily use with a mechanical life of up to 200,000 cycles. It’s built for year-round reliability in homes, apartments, or small offices.

• Battery status alerts help you plan charging before a belt-and-brace moment.
• 100% battery readiness is not promised, but the design aims to support long operation between charges.

Installation, fit, and real-world use

Designed for both left- and right-handed doors, and for US-standard backsets of 60mm and 70mm with thicknesses from 30mm to 55mm. The setup is straightforward for most doors, with thorough testing to ensure dependable operation after installation.

• Ideal for bedrooms, living rooms, closets, offices, apartments, and shared spaces.
• Auto-lock and biometric entry add conveniences without complicating daily routines.