Fingerprint Door Lock Biometric Door Knob - Fast Keyless Entry

In this review of the Fingerprint Door Lock from Zengtumy, the bottom line is simple: it is a compact, multiway entry smart knob intended for apartments, bedrooms, and small offices where quick, convenient access and flexible user management matter most. The single biggest reason to buy is the combination of a 0.3s biometric scanner and five entry methods - fingerprint, password, mechanical key, IC card, and app control - which together replace fumbling for keys and let households share secure access without complicated wiring.

Key Features

• 5-in-1 Keyless Entry: Supports fingerprint, password, mechanical keys, IC card, and app control so households can choose the right access method for each user.
• 0.3s Precision Biometric Scanning: The upgraded fingerprint sensor unlocks in about 0.3s and can store up to 100 fingerprints for families or small staff teams.
• Tuya App Control: Use the app to assign temporary codes, grant remote guest access, and monitor entries for convenient remote management.
• Auto-Lock Feature: An optional auto-lock prevents accidental unsecured doors and reduces the chance of theft when enabled.
• Tool-Free Installation: Installs without drilling on standard left or right swing doors 1.18in to 1.97in thick, letting you fit it yourself quickly.
• Advanced Encryption: Built-in encryption and a durable build provide a higher level of physical security suitable for home and apartment use.

Who It's For

The lock is best for apartment dwellers, families, and owners of small offices who want a compact, easy-to-install smart knob with multiple access methods and remote management. It particularly suits bedroom doors and internal apartment entrances where wiring is not practical and quick biometric access is useful.

It is less suited for heavy-duty exterior security needs where a full deadbolt and reinforced strike are required; customers who need commercial-grade locks or integration with advanced wired security systems should look for a different model designed for exterior high-security installations.

Pros & Cons

Pros

• Fast fingerprint recognition and capacity for about 100 fingerprints makes shared use simple and quick.
• Multiple entry options give flexibility for guests, children, or service workers without sharing physical keys.
• Tool-free installation and compatibility with common door thicknesses make DIY setup straightforward.
• Tuya app control and temporary codes allow remote access management and monitoring from a phone.

Cons

• The device is primarily a smart door knob solution and may not replace a heavy-duty exterior deadbolt for maximum perimeter security.
• Advanced features rely on the app ecosystem, so users who prefer a purely offline product may find remote functions unnecessary.

Specifications

Product type	Fingerprint door knob
Entry methods	Fingerprint, password, mechanical key, IC card, app
Fingerprint capacity	Up to 100 fingerprints
Fingerprint speed	Approx. 0.3s unlocking
Door compatibility	Left/right swing doors, 1.18in to 1.97in thick
App platform	Tuya app control
Installation	Tool-free, zero drilling required

Our Verdict

For apartments, bedroom doors, and small-office interiors that need convenient, secure access, this fingerprint door knob offers excellent value thanks to its fast biometric unlocking, multiple entry methods, and easy tool-free installation. It is a practical upgrade over traditional knobs when you want smart control without rewiring, though those needing exterior deadbolt-level security should consider a more heavy-duty option.

Frequently Asked Questions

Can multiple people be added to the lock?
Yes. The lock stores up to about 100 fingerprints and supports multiple passwords and IC cards for shared use.

Will it fit my door?
It is compatible with standard left or right swing doors between 1.18in and 1.97in thick and installs without drilling.

Does it work without the app?
Yes. You can use fingerprint, password, mechanical key, and IC card without the app, while Tuya app control adds remote and temporary access features.