YFK Smart Fingerprint Door Lock Knob with Tuya App Control – Bluetooth Keyless Entry Lock with Auto-Lock and Emergency Key for Compatible Interior Doors

About This Item

Upgrade compatible interior doors with this smart fingerprint door lock knob, designed to provide convenient keyless access for bedrooms, home offices, private rooms, and other indoor spaces.

The lock combines fingerprint recognition, Bluetooth app control, and mechanical key backup in a compact knob-style design. It can help reduce everyday dependence on physical keys while allowing authorized users to manage access through a compatible Tuya or Smart Life app.

Confirm all supported unlocking methods, app functions, and included accessories before publishing the final listing.

Smart Keyless Entry

Fingerprint Unlocking

Use a registered fingerprint for quick entry without carrying a key.

The lock is listed as supporting multiple stored fingerprints, making it suitable for families, coworkers, or other authorized users.

Confirm before advertising:

• Maximum fingerprint capacity

• Recognition speed

• Wet-finger performance

• Failed-attempt lockout behavior

• Fingerprint deletion and administrator procedures

Bluetooth App Control

Connect the lock to a compatible smartphone through Bluetooth for nearby access management.

Depending on the supplied model and app version, supported functions may include:

• User management

• Nearby locking or unlocking

• Access-record viewing

• Fingerprint management

• Temporary access settings

Bluetooth control normally requires the phone to be within connection range. Do not claim remote unlocking from any location unless a compatible gateway is installed and the function has been verified.

Mechanical Key Backup

A physical key provides an alternative access method if fingerprint recognition or electronic operation is unavailable.

Keep backup keys in a secure location outside the locked room. Confirm the number of included keys and the location of the exterior key cylinder before advertising.

Access Management

The supplier lists support for multiple authorized users.

Potential management features may include:

• Registered fingerprints

• App-managed users

• Temporary access permissions

• Unlock records

• Administrator controls

Do not advertise PIN-code or password entry unless the actual product includes a verified keypad or the supplier clearly explains how passwords are entered.

The pictured knob does not show a conventional numeric keypad, so password access should be removed from the listing until confirmed.

Rechargeable Operation

The lock includes a rechargeable power system and a Type-C charging port.

Listed convenience features include:

• Type-C charging

• Low-battery notification

• Rechargeable operation

• Mechanical key backup

Confirm before advertising:

• Battery chemistry

• Battery capacity

• Charging time

• Estimated operating cycles

• Standby duration

• Required charging voltage and current

• Whether a charging cable is included

• How the lock operates after complete battery depletion

Do not describe the battery as “long-lasting” unless measured runtime or cycle data is available.

Operating Modes

The lock may support different access modes through the app or lock settings.

Passage Mode

Passage mode may keep the door available for frequent entry without requiring fingerprint verification each time.

Potential uses include:

• Home offices

• Meeting rooms

• Bedrooms during active hours

• Frequently accessed interior rooms

Privacy or Restricted Mode

A restricted mode may limit access to authorized users.

Potential uses include:

• Private bedrooms

• Personal offices

• Storage rooms

• Staff-only interior spaces

Confirm the exact mode names and behavior in the supplied user manual before publishing these claims.

Door Compatibility

The supplier lists compatibility with selected standard interior doors.

Verify the following measurements before purchase:

• Door thickness: approximately 35–50 mm

• Backset: 60 mm or 70 mm

• Existing bore-hole size

• Edge-bore size

• Door handing

• Latch alignment

• Clearance around the knob

The lock may support both left- and right-handed doors when installed correctly.

Recommended applications include:

• Bedrooms

• Home offices

• Apartments

• Interior office doors

• Private rooms

• Indoor storage areas

Do not advertise the lock for exterior entrances, emergency exits, fire-rated doors, hotels, or high-security applications unless the required certifications and compatibility have been verified.

Installation Guide

1. Remove the existing door knob and latch hardware.

2. Measure the door thickness, backset, bore hole, and latch opening.

3. Confirm that the new lock matches the existing door preparation.

4. Install the latch and strike plate according to the supplied manual.

5. Install the interior and exterior knob assemblies.

6. Tighten all fasteners without overtightening.

7. Fully charge the lock before setup.

8. Download the specified Tuya or Smart Life app.

9. Create the administrator account and register authorized fingerprints.

10. Test fingerprint, app, and mechanical-key access several times.

11. Confirm that the latch extends and retracts correctly.

12. Test the door from both sides before regular use.

Professional installation may be appropriate when the existing door preparation does not match the lock.

Safety and Usage Instructions

• Confirm all door measurements before installation.

• Test every access method before closing the door.

• Keep mechanical backup keys in a secure, accessible location.

• Charge the device after receiving a low-battery warning.

• Do not rely on the lock as the only access method until backup entry has been tested.

• Protect the electronic components from rain, condensation, and excessive moisture.

• Do not install on an exterior door without a verified weather-resistance rating.

• Keep administrator credentials and app access secure.

• Remove access for former users promptly.

• Inspect the latch, screws, knob movement, and battery condition regularly.

• Do not install on fire exits or emergency-egress doors unless specifically approved.

• Follow local building, fire, rental, and access-control requirements.

Materials and Intended Use

Supplier-listed construction includes:

• Aluminum-alloy exterior components

• Electronic fingerprint sensor

• Internal motor and control components

• Rechargeable battery system

• Mechanical latch and key cylinder

The product is intended primarily for indoor access-control applications.

Before advertising, confirm:

• Exact app name and supported operating systems

• Fingerprint capacity

• Actual unlocking methods

• Gateway requirements

• Remote-access capability

• Battery capacity and runtime

• Number of included keys

• Charging cable inclusion

• Door measurement requirements

• Weather-resistance rating

• Operating-temperature range

• Security or lock-grade certifications

Avoid describing the product as waterproof, burglar-proof, commercial-grade, hotel-grade, high-security, or remotely accessible unless those claims are supported by verified documentation.

Why Choose This Smart Door Lock?

Convenient Fingerprint Access

Registered users can enter without searching for a physical key.

App-Based User Management

Bluetooth app connectivity may provide convenient nearby access management and user settings.

Mechanical Backup Entry

The physical key offers an important backup when electronic access is unavailable.

Compact Interior-Door Upgrade

The knob-style design can replace compatible traditional hardware without the appearance of a large keypad lock.

Suitable for Everyday Indoor Spaces

A practical option for compatible bedrooms, home offices, apartments, private rooms, and interior office doors.

Package Contents

Confirm the exact package before publishing. A complete set may include:

• Smart fingerprint lock knob assembly

• Adjustable latch

• Strike plate

• Mounting screws

• Mechanical backup keys

• Charging cable

• Installation instructions

Do not show or list accessories as included unless they are confirmed in the supplied package.