Fingerprint Door Lock Smart Door Knob with Keypad - Keyless Security

In this review of the Fingerprint Door Lock smart door knob, the bottom line is straightforward: this is a practical, feature-rich keyless lock for homeowners who want simple biometric access and flexible entry options. It stands out for offering a 4-in-1 unlocking system that includes fingerprint recognition, personalized codes, app Bluetooth control, and backup keys, making it ideal for bedroom doors, home offices, and interior doors where convenience and privacy matter most. Installation fits common US doors and the rechargeable battery plus emergency key make it a reliable everyday choice.

Key Features

• 4-in-1 Unlocking: Choose fingerprint, passcode, Bluetooth app, or backup key for multiple convenient entry options.
• Fingerprint Capacity: Stores up to 20 fingerprints so family members and frequent guests can be added easily.
• App Management: Use the Smart Life app for user management, code sharing, and viewing access history when paired locally with Bluetooth.
• Auto Lock & Modes: Auto lock, passage mode and private mode let you tailor access behavior to privacy and daily use.
• Rechargeable Power: Built-in 400mAh battery with Type-C charging provides long battery life and an emergency key for backup.
• Anti-Peep Keypad: The keypad supports anti-peep code entry and temporary codes for guests, deliveries, or housekeepers.

Who It's For

This lock is a good fit for homeowners or renters who want a modern, keyless solution on interior doors such as bedrooms, studies, or side doors and for small offices where controlled access is useful. It is especially useful for households that want to share temporary or permanent codes without cutting keys.

People who need full remote Wi-Fi control should note a separate gateway is required for pairing to Wi-Fi; those who want heavy-duty exterior security for main entry doors should consider a commercial grade deadbolt instead of a knob-style lock.

Pros & Cons

Pros

• Multiple unlocking options provide flexible, convenient access for different users and situations.
• Easy installation on US standard doors and a design that fits left and right handed doors.
• App features include user management, temporary codes and history logs for oversight and convenience.
• Rechargeable Type-C battery and backup key reduce worry about power loss.

Cons

• Wi-Fi remote access requires purchasing a separate gateway, so out-of-the-box remote control is not included.
• As a knob lock it is better suited to interior doors than as a high-security exterior deadbolt replacement.

Specifications

Product Type	Smart fingerprint door knob
Unlock Methods	Fingerprint, PIN code, Bluetooth app, backup key
Fingerprint Capacity	Up to 20 users
Door Compatibility	Backset 2-3/8 in or 2-3/4 in; thickness 1-3/8 to 2-1/8 in
Battery	400mAh rechargeable, Type-C to USB-A charging
App	Smart Life via Bluetooth (gateway required for Wi-Fi)
Support	1-year technical support with 24 hour response

Our Verdict

The Fingerprint Door Lock smart knob delivers practical, modern convenience for interior doors and small office entry points, with reliable biometric access and flexible code and app management. It offers strong value for users who want easy installation, rechargeable power and multiple access modes; just plan for an added gateway if you need true remote Wi-Fi control.

Frequently Asked Questions

Will this fit my door?
This lock fits US standard doors with a 2-3/8 in or 2-3/4 in backset and door thickness from 1-3/8 to 2-1/8 in and works for left and right handed doors.

Can I control it from anywhere?
Bluetooth app control is built in, but remote Wi-Fi control requires a separately purchased gateway that pairs the lock to the Smart Life app.

What happens if the battery dies?
The lock has a 400mAh rechargeable battery with Type-C charging and also includes a backup mechanical key for emergency access.