If you’re looking for a modern way to secure your home, office, or rented apartment, WELOCK Smart Lock U81 is one of the best solutions. This smart cylindrical lock lets you get in in six different ways—via fingerprint, a PIN code with anti-eavesdropping protection, an RFID card, an app via Bluetooth, voice control with Alexa (with a Wi-Fi gateway), and even a classic key as an emergency backup. All of this without having to change your door or drill new holes.
That good price is available for the first time ever!
You can find the smart cylindrical lock WELOCK Smart Lock U81 at the official WELOCK seller. It’s stocked directly in the European warehouse, meaning very fast delivery—already within a week—and with no extra fees. A 2-year warranty is available, just like for all products on their web shop.
WELOCK U81, 2-year warranty
TIPExpress delivery from a European warehouse without customs duty and VAT.
This product will be delivered to you express from a local warehouse in Europe. Delivery from EU warehouses usually takes 2–10 days and is handled by courier. When it arrives, you won’t pay any additional fees — no customs duty and no VAT.
TIPExpress delivery from a European warehouse without customs duty and VAT.
This product will be delivered to you express from a local warehouse in Europe. Delivery from EU warehouses usually takes 2–10 days and is handled by courier. When it arrives, you won’t pay any additional fees — no customs duty and no VAT.
Easy installation without tools
Installing a smart cylindrical lock is surprisingly simple. You don’t need professional service or complicated tools. Just remove the old cylinder, insert the new one, attach the front and back parts, and tighten the screws. The whole process takes only a few minutes, and even a complete beginner can handle it.
WELOCK U81 is compatible with most euro-profile cylinders, so it works for wooden, apartment, and entrance doors. That makes it an ideal solution for homes, offices, and rented properties like Airbnb.
Durability and reliability in every kind of weather
The lock is made with stainless steel and durable PC plastic, ensuring a long service life. With certification IP65, it’s water-resistant and dustproof, and it works in temperatures from -25 °C to 60 °C. So whether you live in an apartment block or a family house—WELOCK U81 is ready for everyday use.
The actual lifespan has been tested for over 100,000 unlocking cycles, so you don’t have to worry about premature wear even with heavy use.
Long battery life with low-battery alerts
The smart cylindrical lock runs on four AAA batteries, which can last up to 12 months under normal use. If the batteries start to run out, the lock will alert you in time about low voltage (at 4.5 V). So you won’t have to worry about being stuck outside your door.
Even if the batteries completely die, you’ll still have an emergency mechanical key available. That’s a big advantage over purely electronic solutions.
Maximum security and access control
The lock supports up to 200 PIN codes, 100 fingerprint entries, and almost 200 RFID cards. You can also split access between 10 administrators and 190 regular users. Management is simple and clear through the WELOCK mobile app.
A useful feature is also the PIN anti-eavesdropping protection. When entering your code, you can add random digits before or after the correct code—reducing the risk that someone is watching your fingers.
Remote control and integration with Alexa
After adding the Wi-Fi gateway WIFIBOX3, you get remote control, access sharing, and real-time log monitoring. In practice, this means you can let a visitor in even when you’re not at home—or see exactly who entered and when.
If you use a smart home setup, you’ll definitely appreciate compatibility with Amazon Alexa. Unlocking your door with a voice command is a convenient extra that takes everyday comfort even further.
Technical specifications for the WELOCK Smart Lock U81
| - | WELOCK Smart Lock U81 |
|---|---|
| Lock type | Electronic cylindrical lock |
| Unlocking options | Fingerprint / PIN code / RFID card / Bluetooth app / Alexa (Wi-Fi gateway) / Mechanical key |
| Capacity | 200 PIN codes / 100 fingerprints / 199 cards |
| User management | 10 admins + 190 users |
| Power | 4× AAA batteries |
| Battery life | Up to 12 months |
| Low-voltage alarm | Below 4.5 V |
| Durability | IP65 / -25 °C to 60 °C |
| Material | Stainless steel + PC plastic |
| Test lifespan | 100,000 cycles |
| Installation | DIY without drilling / compatible with euro cylinders |
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