Door Knob LNDU Electronic Fingerprint Lock Room Smart Door Lock Zinc Alloy Matte Easy Installation
Door Knob LNDU Electronic Fingerprint Lock Room Smart Door Lock Zinc Alloy Matte Easy Installation
Hero image 0 of Door Knob LNDU Electronic Fingerprint Lock Room Smart Door Lock Zinc Alloy Matte Easy Installation, 0 of 8
In 50+ people's cartsOverall pick
Visit the LNDU Store

Door Knob LNDU Electronic Fingerprint Lock Room Smart Door Lock Zinc Alloy Matte Easy Installation

55 ratings
Door Knob LNDU Electronic Fingerprint Lock Room Smart Door Lock Zinc Alloy Matte Easy InstallationDoor Knob LNDU Electronic Fingerprint Lock Room Smart Door Lock Zinc Alloy Matte Easy InstallationSmart Door Knob D500 Keyless Smart Door Lock Smart Deadbolt App Control Fingerprint 2 Keys Electronic Door Lock Home Apartment Office Black 4pcsSmart Door Knob D500 Keyless Smart Door Lock Smart Deadbolt App Control Fingerprint 2 Keys Electronic Door Lock Home Apartment Office Black 2pcs
Piece Count1

Key item features

  • Features a sleek black finish.
  • Ideal for bedrooms, home offices, closets, Airbnb rentals, and apartments.
  • Includes an emergency Type-C charging port and a low power alarm.
  • Manage fingerprints, review unlock records, and set auto-lock timing using the Bluetooth app.
  • The app has a Bluetooth range of approximately 5 meters (16 feet).
  • If the lock goes offline, it can be unlocked with a registered fingerprint or key, and the app will reconnect.
  • Biometric sensor recognizes fingerprints in just 0.1 seconds.
  • Stores up to 100 fingerprints, suitable for family members or small teams.
  • Built-in sensor can automatically engage the lock after closing the door when auto-lock is enabled.
  • Auto-lock delay can be set between 5 and 59 seconds.
  • Installs in minutes using just a screwdriver.
  • Fits most standard US door preparations (2-1/8" (54mm) hole, 2-3/8" or 2-3/4" (60 or 70mm) backset).
  • Comes with a full 12-month warranty.
  • ANSI Class: Grade 1.
  • Assembled product dimensions: 14.6 cm (height) x 22.2 cm (length) x 9.2 cm (width).
  • Assembled product weight: 1.82 lb.
  • Brand: Lingdu.
  • Color: Black.
  • Finish: Matte.
  • Handing: Ambidextrous.
  • Hardware lock type: Electronic Lock.
  • Items included: Front lock, lock cylinder, rear lock, and mounting screws.
  • Manufacturer: LINGDU Technology company.
  • Material: Zinc alloy.
  • Product line: Smart Door Lock.
  • Shape: Sphere.
  • Size: 22.20 x 14.60 x 9.20 cm.
  • This device requires three AAA batteries to operate (batteries not included).

About this item

Product details

Specifications

Warranty

Customer ratings & reviews

4.1 out of 5 stars
stars
55 ratings40 reviews
How item rating is calculated
  1. 5 stars67% (37)
  2. 4 stars9% (5)
  3. 3 stars5% (3)
  4. 2 stars2% (1)
  5. 1 star16% (9)

Reviews summary

Pros

  • : The system blocks unauthorized entry, protecting items.
  • : The finish matches product photos and looks neat.
  • : Setup completes within minutes on many doors.
  • : The sensor offers convenient lock and unlock setup.

Neutral

  • : System offers real-time tracking but needs extra apps and may fail.
  • : The layout is intuitive but may crash or freeze.
Generated by AI
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 40 reviews

Sep 2, 2026
Reviewer name: bobby
Top Reviewer
Item details
Piece count: 1
Sold byLNDU StoreDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

great product easy install

super easy install I love that they think of everything more or less and my favorite feature is having it unset up yet so it doesn't lock on itself that's awesome. but this one has app function fingerprint mechanical key auto lock emergency port power. perfectly matches most doors no modifications needed 99.9% of the time. I like the rectangle shape instead of the standard around door knob better grip personal preference highly recommended side doors indoors outdoors basements garages you name it you can find a use for basic bedroom keep the kids out when it's out time ;-) once again I have to commend on the install process I never knew how easy it could be change into digital locks I remember and it was such a difficult job installing the old fashioned deadbolt and key.

Incentivized Review
Helpful?7889EVFO9AV820287901776
Aug 2, 2026
Reviewer name: anonymous
Top Reviewer
Item details
Piece count: 1
Sold and shipped byLNDU Store
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Advanced technology...

Designed to fit standard doors whether wood, metal or fireproof. No wiring, it just simply goes where your pre-existing knob was. Takes less than 15 minutes. It comes with instructions and template. You can add or remove thumbprints remotely. It locks after 5 seconds and you can follow it in real time using the app. It's easier and faster than keys and because I can follow it, I always know when my kids arrive home safely.

Incentivized Review
Helpful?7889EVFO9AV820287901776
Aug 29, 2026
Reviewer name: thomas
Item details
Piece count: 1
Sold byLNDU StoreDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Great lock for my home

super easy to set up. The manufacturing put efforts into this product. It came with instruction and video demonstration to install the lock. i can add multiple users and change opening options anytime

Incentivized Review
Helpful?7889EVFO9AV820287901776
Current price is Now $29.99
You save $6.00
was $35.99
Price when purchased online
  • Free Holiday returns until Jan 31
Walmart Protection Plan by Allstate

(Only one option can be selected at a time)

Home Door Lock Installation Service

How do you want your item?

Try 30 days for just $1! Choose a plan at checkout.
How do you want your item?
Ships to
Arrives by Tomorrow
.
Order within 10 hr 27 min
Sold by LNDU StorePro Seller
Fulfilled by Walmart
4.735384615384615 out of 5 stars
4.7 stars out of 5, based on 325 seller reviews(4.7)
Extended holiday returns
Free Holiday returns until Jan 31
walmart plus

Try 30 days of Walmart+ for just $1!

T&C apply.