Smart locks are becoming a more and more popular solution for homes, apartments, offices, or rentals. One of the most interesting products in this category is WELOCK PCB51, which offers 5 unlocking methods, long battery life, and easy installation on European doors. The advantage is that you can control it remotely as well, and everything works without the need for monthly fees.
Coupon price in the official store
You can find the Smart lock WELOCK PCB51 in the official Welock store. It’s located directly in the European warehouse, which means very fast delivery—already within a week—and with no extra charges! You also get a 2-year warranty and better customer support directly from the brand.
WELOCK smart lock PCB51, 2-year warranty
EU warehouse
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.
If you want to use smart features via the cloud and Wi-Fi, you need to buy the WiFiBox3 device, which makes it all possible—and the entire communication is secured at the hardware level.
WELOCK WIFIBOX3
EU warehouseTIPExpress 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.
5 unlocking methods and excellent compatibility
The main advantage of this lock is flexibility. WELOCK PCB51 lets you unlock the door in up to five different ways—using the WELOCK mobile app (for Android and iOS), a keypad with a PIN code, RFID cards, voice control via Amazon Alexa (in combination with the WiFiBox3 module), and even through remote Wi-Fi connection. It’s an ideal solution not only for everyday users, but also for Airbnb hosts or rental property owners, where you need to generate codes for guests without being physically present.
Supported technologies like Bluetooth and optional Wi-Fi connectivity give users maximum freedom. In the app, you can not only manage access, but also track real notifications and battery status.
Durable construction and long battery life
The lock is designed to work reliably in different conditions. It has IP65 certification, meaning it’s resistant to water and dust. It can also handle extreme temperatures from -25°C to +60°C, so you can use it without any issues for entry doors to your house or cottage.
Power is provided by 3 AAA batteries, which are not included in the package, but the manufacturer states a battery life of up to several months per setup under normal use. Once the battery is depleted, the app will warn you in advance, and there is also a mechanical emergency unlocking method available.
Installation on standard European doors in 10 minutes
One of the biggest advantages of the WELOCK PCB51 is compatibility with the European profile of cylinder locks. That means it’s suitable for most standard doors with a thickness of 30 to 70 mm. You can install it yourself at home—the lock simply replaces the original cylinder and you screw it in. There’s no need for drilling or modifying the door frame.
In the box, you’ll find not only the lock itself, but also 3 RFID cards, accessories, instructions in multiple languages, and all the necessary components for immediate use.
Technical specifications of WELOCK PCB51
All the important specifications can be found in the clear table below:
| WELOCK PCB51 | |
|---|---|
| Unlocking methods | App / keypad / WiFi / Alexa / RFID card |
| App | WELOCK for iOS and Android |
| Connectivity | Bluetooth / WiFi (with WIFIBOX3) |
| Power | 3 x AAA batteries (1.5 V) |
| Voltage | 3.6V – 4.5V |
| Weight | 480 g |
| Material | Zinc / stainless steel |
| Color | silver |
| Durability | IP65 / -25 to +60 °C |
| Compatibility | European profile / door thickness 30 – 70 mm |
| Warranty | 2 years |
| Package contents | Smart cylinder / 3x RFID card / manual / mounting kit |
Security, comfort, and a modern design
With premium materials, the lock looks modern and elegant. It works well for both homes and offices and gives your doors not only practical functionality, but also a technological “upgrade”. With the option to generate codes via the app, notifications for every unlock, and access management, you can be sure you’re always in control—even remotely.
And if you’re wondering what to do if you lose a card or forget the code, the lock also supports resetting the admin code and deleting lost RFID cards. That makes it one of the most practical options in its price range.
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