LNDU D500 Smart Fingerprint Entrance Door Lock with App Control

Control access to your personal space with the LNDU D500 smart Entrance Door Lock from Idiello.com. This biometric door knob combines fingerprint recognition, smartphone app control and mechanical-key access in one convenient design. It stores up to 100 fingerprints and offers auto-lock, passage and privacy modes for bedrooms, offices, home interiors and other suitable doors.

Fast recognition, an adjustable auto-lock delay and emergency access options provide everyday convenience without relying entirely on a traditional key.

Key Features of the Entrance Door Lock

Three Keyless and Backup Entry Methods

The LNDU D500 offers three ways to unlock a compatible door:

• Fingerprint: Use a previously registered fingerprint for quick entry.
• Smartphone app: Manage and operate supported lock functions through the mobile application.
• Mechanical key: Use the physical backup key when electronic access is unavailable.

The mechanical key provides essential backup access rather than fully keyless operation.

0.3-Second Fingerprint Recognition

The upgraded biometric sensor recognises a registered fingerprint in approximately 0.3 seconds. The stated complete unlocking time is around one second, allowing authorised users to enter without searching for a key.

The manufacturer states a fingerprint-recognition accuracy rate of 99.9%. Actual performance may be affected by finger placement, moisture, dirt or fingerprint condition.

Stores Up to 100 Fingerprints

Register and manage as many as 100 fingerprints for authorised users. This capacity is practical for:

• Family members
• Roommates
• Employees
• Regular authorised users
• Shared home or office spaces

Fingerprint permissions can be managed through the supported smartphone app.

Three Versatile Operating Modes

Choose the mode that best suits the room and situation.

Auto-Lock Mode

The door locks automatically after closing. Use the app to customise the delay before the lock engages.

Passage Mode

Keeps the door unlocked when frequent access is needed, such as during meetings, office hours, moving or household activities.

Privacy Mode

Disables outside electronic entry through registered fingerprints and the app. The door can still be opened from the inside or with an emergency mechanical key.

Smartphone App Control

The compatible mobile app allows users to manage supported settings and access functions. Available features include:

• Managing registered fingerprints
• Enabling the auto-lock function
• Adjusting the auto-lock delay
• Controlling supported smart-lock settings

The application name, supported mobile operating systems and remote operating range were not included in the product details.

Customisable Auto-Lock Delay

Set how long the lock waits before securing the door after it closes. This offers more flexibility than a fixed locking interval and allows the behaviour to be adapted to everyday routines.

Low-Battery Warning

The lock provides an alert when its batteries are running low. This gives users time to replace the batteries before electronic access becomes unavailable.

Type-C Emergency Power Port

If the installed batteries become fully depleted, connect a power bank to the Type-C emergency charging port to temporarily power the lock for access.

The Type-C connection is described as an emergency power feature and should not be presented as confirmation of an internal rechargeable battery.

Mechanical Emergency Access

The supplied physical keys provide an alternative entry method if the battery is depleted or electronic access cannot be used. Keep a backup key in a secure location outside the locked room.

Product Benefits

• Reduces the need to carry a key for routine entry.
• Provides fingerprint, app and mechanical-key access.
• Recognises registered fingerprints quickly.
• Stores access for up to 100 fingerprints.
• Automatically locks the door when the selected mode is active.
• Keeps the door open for frequent access in passage mode.
• Restricts outside electronic entry in privacy mode.
• Allows the auto-lock delay to be customised.
• Warns users before the batteries are depleted.
• Supports temporary emergency power through a Type-C port.
• Suitable for managing access in homes and offices.
• Combines smart access controls with mechanical backup entry.

Perfect For

• Bedrooms
• Home offices
• Private offices
• Shared homes
• Roommates
• Interior home doors
• Workplace rooms
• Meeting rooms
• Hotel-room applications where compatible and authorised
• Users who prefer fingerprint access
• Families and small teams

How to Use

Registering Fingerprints

1. Install the lock on a compatible door according to the product manual.
2. Install the required batteries.
3. Download and connect the supported smartphone app.
4. Follow the app instructions to add an administrator.
5. Register the fingerprints of authorised users.
6. Test each registered fingerprint before relying on the lock for daily access.

Unlocking the Door

1. Place a registered finger correctly on the biometric sensor.
2. Wait for fingerprint recognition.
3. Turn the knob after the lock grants access.

Alternatively, use the supported smartphone app or mechanical key.

Selecting an Operating Mode

• Choose Auto-Lock Mode for automatic locking after the door closes.
• Choose Passage Mode when the door needs to remain unlocked.
• Choose Privacy Mode to disable outside fingerprint and app access temporarily.

Using Emergency Type-C Power

1. Connect a compatible power bank to the Type-C emergency power port.
2. Allow the lock to receive temporary power.
3. Unlock it using an authorised electronic method.
4. Replace the depleted batteries promptly.

The emergency port supplies temporary operating power; it is not described as a battery-charging system.

Product Specifications

Package Includes

Based on the supplied information:

• 1 × LNDU D500 Smart Fingerprint Door Knob
• Mechanical backup keys

The number of keys and any additional installation components should be confirmed from the final package before publication.

Installation and Compatibility Information

• Confirm that the lock fits the intended door before purchase.
• Check the door thickness, borehole dimensions, backset and opening direction against the final installation manual.
• This product is described for bedrooms, offices and homes.
• Compatibility with exterior entrance doors has not been confirmed.
• Weather resistance has not been stated.
• Compatibility with recreational vehicle doors is not provided, so it should not be marketed as an RV entrance door lock.
• Installation should follow the supplied manufacturer instructions.
• Keep at least one mechanical key in a secure location outside the locked space.

Care and Maintenance

• Keep the fingerprint sensor clean and dry.
• Wipe the knob with a soft, dry cloth.
• Avoid abrasive cleaners and harsh chemicals.
• Replace the batteries after receiving a low-battery warning.
• Check the lock and door alignment periodically.
• Do not force the knob when the lock is engaged.
• Protect the Type-C port from moisture and debris.
• Test mechanical-key access occasionally.
• Review registered fingerprints and remove access that is no longer required.

Important Security Information

• No lock can guarantee complete protection against every form of forced entry.
• Privacy mode disables outside electronic access, but the emergency mechanical key remains usable.
• Store backup keys securely and do not leave them inside the locked room.
• Review fingerprint permissions regularly.
• Follow the app’s security and administrator guidance.
• Replace low batteries promptly.
• Use the Type-C port only for temporary emergency power.
• Confirm suitability before using this lock on an exterior door, rental property or regulated workplace.

Choosing an Entrance Door Lock Set

When comparing an entrance door lock set, consider the intended door, installation measurements, access methods and backup options. This model is designed as a smart door knob offering biometric, app and mechanical entry.

Customers comparing different entrance door locks should verify door compatibility and environmental suitability. Although searches may include Schlage entrance door locks or RV models, this product is the LNDU D500 and should not be represented as a Schlage product or an RV-specific deadbolt.

Delivery Information

Delivery estimates may vary because of customs clearance, public holidays, courier delays or remote delivery locations.