Fingerprint Door Knob Smart Lock - Biometric 5-in-1 Fingerprint Lock

In this review of the Fingerprint Door Knob Smart Lock, the bottom line is simple: this is a good fit for anyone who wants keyless, biometric access for interior doors without complicated installation. The reviewer found the lock delivers fast fingerprint entry and flexible unlocking options, while also offering remote management through the Tuya Smart App when paired with a gateway. For bedrooms, home offices, and interior doors where convenience and controlled access matter, the lock's mix of fingerprint, card, code, app and mechanical key access is the single biggest reason to consider it.

Key Features

• Five unlocking methods: Fingerprint, 4 IC cards, keypad code, Tuya Smart App and 2 mechanical keys provide flexible entry options for different users and situations.
• Biometric convenience: Fingerprint access lets authorized users enter with a single touch, reducing the risk and hassle of lost keys.
• App management: Tuya Smart App support allows remote control, user management and temporary codes when the lock is connected via the Foxgard Gateway.
• High capacity: The lock stores up to 100 fingerprints, 100 cards and 100 codes, making it suitable for families or small offices with many users.
• Emergency power: A built-in Type-C port accepts a power bank for temporary power if batteries run out, avoiding lockouts.
• Easy installation: Designed for standard doors and both left and right handing, the knob installs without extra drilling for most interior applications.

Who It's For

The lock is best for homeowners and small office users who want a secure, keyless solution for interior doors like bedrooms, home offices or storage rooms and who value biometric access. It suits people who want to manage users and view logs via the Tuya Smart App and those who may expand a smart home setup using the Foxgard Gateway for voice control.

It is less suited to exterior doors needing heavy-duty weather resistance or users who cannot or will not use AAA batteries and occasional app management. Buyers seeking military-grade or commercial grade exterior locks should look for products specifically rated for outdoor use.

Pros & Cons

Pros

• Reliable fingerprint entry that is fast and intuitive for regular users.
• Multiple unlocking methods give flexibility for guests and family members.
• App integration enables remote management and temporary codes when paired with a gateway.
• Long battery life with clear low battery alerts and an emergency Type-C power option.

Cons

• Build quality and long-term reliability received mixed customer feedback, so expectations should be tempered for heavy commercial use.
• Battery life varies by usage and requires 4 AAA batteries that are not included.

Specifications

Product type	Fingerprint door knob smart lock
Unlock methods	Fingerprint, 4 IC cards, keypad code, Tuya Smart App, 2 mechanical keys
User capacity	Up to 100 fingerprints, 100 cards, 100 codes
Power	4 AAA alkaline batteries (not included), Type-C emergency power
Installation	Fits standard interior doors; left and right handed
Smart features	Tuya Smart App control and access logs; voice control available with Foxgard Gateway

Our Verdict

The Fingerprint Door Knob Smart Lock is a practical, well featured option for interior doors where biometric convenience and flexible access control matter. It offers strong capacity for users and multiple unlocking methods, plus app management for remote control if integrated into a Tuya setup. For bedrooms and small offices it represents good value, though those needing rugged exterior hardware or guaranteed long-term commercial reliability should consider heavier duty alternatives.

Frequently Asked Questions

Can I use the app without additional hardware?
App features work best when paired with a compatible gateway; basic local functions like fingerprint registration and keypad codes work without extra hardware.

What happens if the batteries die?
Low battery alerts are provided and you can temporarily power the lock via the built-in Type-C port using a power bank to avoid lockout.

How many fingerprints can it store?
The lock supports up to 100 fingerprints, making it suitable for families and small office use.