In 2025, home security is no longer just about locks and keys — it’s about smart integration, convenience, and control.
At the forefront of this transformation is the WELOCK Smart Lock PCB51 Cylinder, a product designed to combine solid engineering with intelligent technology.
With an upgraded design and smart connectivity, this lock offers advanced protection, simple installation, and seamless compatibility with modern smart homes.
Now priced at €109 after a €60 discount with coupon VD60, the WELOCK Smart Lock PCB51 Cylinder ships directly from the European Warehouse and includes a 2-year warranty.
It’s not just a lock — it’s a smarter, safer way to protect your home.
Smart Security Built for Modern Living
The WELOCK Smart Lock PCB51 Cylinder is designed for homeowners who value both security and simplicity.
It replaces your existing door cylinder and instantly transforms a traditional door into a digital, keyless entry system.
Unlocking options include fingerprint access, smartphone app control, RFID card, and a traditional mechanical key for emergencies.
This flexibility ensures you’ll never be locked out or dependent on a single method.
The WELOCK app (available for Android and iOS) allows you to manage access permissions, view activity logs, and even share digital keys with guests or family members.
All data is protected through encryption, so your privacy remains secure at all times.
Built to last, the lock’s durable materials resist tampering and environmental damage, making it suitable for both indoor and outdoor doors.
With the WELOCK Smart Lock PCB51 Cylinder, home security becomes effortless and intelligent — exactly what modern homeowners need in 2025.
Effortless Installation and Door Compatibility
One of the biggest advantages of the WELOCK Smart Lock PCB51 Cylinder is its user-friendly installation.
It’s designed for quick DIY setup and fits most Euro-profile cylinders, commonly found in European doors.
Before purchasing, measure your door thickness — the lock fits doors between 30 mm and 70 mm, covering a wide range of residential and office door types.
You don’t need to drill new holes or modify your existing handle setup; installation typically takes about 15–20 minutes with the included tools and guide.
This makes it a great choice for homeowners, renters, and small business owners who want an easy upgrade without professional installation fees.
Despite its simplicity, the lock maintains a robust internal structure, ensuring smooth performance and reliable security.
If you ever move to a new home, you can simply remove the cylinder and reinstall it in your new door — no technical help required.
The WELOCK Smart Lock PCB51 Cylinder proves that upgrading your home security can be fast, easy, and stress-free.
Backup Power and Emergency Access
Smart locks depend on batteries, but the WELOCK Smart Lock PCB51 Cylinder ensures you’re never locked out due to power loss.
It operates on standard AAA batteries that last up to one year, and you’ll receive low-battery alerts through the WELOCK app before power runs out.
In the unlikely event the batteries deplete completely, there are two reliable backup options:
- USB Type-C Emergency Power Port: You can connect a power bank to temporarily supply energy, unlock the door, and replace the batteries.
This dual protection guarantees continuous access and eliminates the most common frustration smart lock users face.
The thoughtful engineering of the WELOCK Smart Lock PCB51 Cylinder keeps security intact — even when the batteries don’t cooperate.
Smart Home Integration with WIFIBOX3
For those who love automation, the WELOCK Smart Lock PCB51 Cylinder integrates perfectly with Alexa and Home Assistant — but only when connected via the WELOCK WIFIBOX3.
This optional Wi-Fi bridge unlocks the full potential of your smart lock.
With it, you can:
- Lock or unlock remotely through the WELOCK app
- Monitor access history in real time
- Control the lock using voice commands like “Alexa, lock the door”
Without the WIFIBOX3, the lock works perfectly through Bluetooth within range, but remote access and voice control require the bridge connection.
This setup ensures maximum flexibility for different users — whether you prefer full smart home integration or simple local control.
By combining the WELOCK Smart Lock PCB51 Cylinder with WIFIBOX3, you can create a truly connected and convenient home experience.
Why the WELOCK Smart Lock PCB51 Cylinder is a Smart Investment
At just €109 (after using coupon VD60), the WELOCK Smart Lock PCB51 Cylinder delivers exceptional value for its advanced features.
It’s not only secure and stylish but also practical — offering the peace of mind that your home is protected by modern technology.
With support for fingerprint access, smartphone control, emergency keys, and power backup, it’s a complete solution for anyone looking to upgrade traditional locks without complexity.
Add in fast shipping from the European Warehouse and a 2-year warranty, and it’s clear that WELOCK offers one of the most reliable smart security systems on the market.
For 2025, smarter living starts at your front door — and the WELOCK Smart Lock PCB51 Cylinder makes that transformation simple, affordable, and secure.
