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Published: 8 June 2025
Also featured in: Top 10 Smart Door Locks for UK Homes in 2025
Overview
The Security Smart Lock C220 is designed for homeowners who want the convenience of keyless entry without sacrificing security. It combines biometric fingerprint recognition, a numeric keypad, Bluetooth app access, and mechanical key backup in one sleek unit. With a focus on both usability and aesthetics, the C220 promises to bring professional-grade smart access to everyday UK homes. This review takes a closer look at how the lock performs under real-world conditions, its smart features, security credentials, and who it’s best suited for in 2025.
Installation Process
Installing the Security Smart Lock C220 is a straightforward DIY project for anyone comfortable with basic tools. The lock fits standard UK doors between 35–55mm thick and comes with clear instructions and templates. You’ll need a Phillips screwdriver, possibly a drill if new holes are required, and around 15–30 minutes of time.
The included mounting plate makes alignment easy. The internal and external units connect via a spindle and ribbon cable, with the battery compartment located inside the handle. Pairing with the mobile app is done over Bluetooth, and users can register fingerprints and PIN codes directly through the app.
Daily Use and Fingerprint Recognition
The C220’s standout feature is its fingerprint scanner, which recognizes fingerprints in under 0.3 seconds. In testing, it consistently recognized dry, wet, and slightly dirty fingers with minimal issues. The sensor is located on the front panel for quick access and allows up to 100 prints—ideal for family members or regular guests.
The lock responds immediately, unlocking the door with a satisfying click. Unlike cheaper models, there’s no noticeable lag. For added versatility, users can opt to use a PIN on the backlit keypad or unlock via Bluetooth through the mobile app.
Mobile App Features
The companion app (available for iOS and Android) allows Bluetooth-based unlocking, user management, and access log tracking. It supports creating temporary PINs or scheduled access codes for visitors—perfect for Airbnb hosts or service personnel.
While the app doesn’t offer Wi-Fi or cloud-based control by default, users can purchase a separate Wi-Fi bridge (not included) to enable remote unlocking. Without this, you’ll need to be within Bluetooth range (approx. 10m) to use the app.
Build Quality and Weather Resistance
The Security Smart Lock C220 features a matte black zinc alloy housing that feels solid and premium. It’s IP65 rated, making it suitable for outdoor use even in the UK’s unpredictable weather. The keypad and fingerprint sensor are sealed, ensuring protection from rain, dust, and temperature fluctuations.
Its low-profile aesthetic blends well with both modern and traditional doors, and the illuminated keypad is easy to read in low light.
Battery Life and Power Options
The C220 is powered by 4 AA batteries, delivering approximately 8–10 months of use depending on frequency. A low battery warning is issued via the app and on the lock itself. If the battery dies completely, a USB-C emergency power port or the included mechanical key can be used for access.
Security and Data Protection
The lock uses AES-128 encryption for data transmission, and biometric data is stored locally—not in the cloud. Anti-tamper features include an automatic lockout after multiple failed attempts and a manual override key hidden beneath a protective cap.
While it lacks native smart assistant integration (no Alexa or Google Home), this might be a plus for privacy-conscious users seeking a more isolated security device.
Pros
- Fast and accurate fingerprint recognition
- App and PIN code access for added flexibility
- Solid, weatherproof build (IP65 rated)
- Easy DIY installation
- Ideal for Airbnb and guest access
Cons
- No smart assistant or Wi-Fi integration by default
- Bluetooth-only unless Wi-Fi bridge is purchased
- Fingerprint sensor needs occasional cleaning
How It Compares
Compared to other smart locks in the £90–£130 price range, the C220 holds its own. While it lacks Wi-Fi and voice assistant support like the Ultion Nuki or Yale Linus, it surpasses competitors in fingerprint accuracy and ease of setup. For users prioritizing local control and biometric access, the C220 is a standout.
Final Verdict
The Security Smart Lock C220 is a high-performing, reliable, and well-designed smart lock for users who want hassle-free, keyless security. Its fingerprint scanner is a highlight, supported by a good mobile app and robust physical construction. While it lacks cloud control and smart assistant integration, this may be a plus for privacy-focused homes. Whether you’re managing guest access or simply tired of fumbling for keys, the C220 is one of the best biometric locks you can install in the UK this year.
★★★★☆ (4.5/5)