# WELOCK U81 Smart Door Lock,6-in-1 Fingerprint Biometric Lock with App Control, RFID Card and Keypad Entry for 50-95mm British Doors, Weatherproof Security Lock

Source: https://www.ranked10.co.uk/home/best-smart-lock/welock-u81
Ranked #5 in "Best Smart Lock 2026: Ten Door Locks Ranked on Security First": https://www.ranked10.co.uk/home/best-smart-lock

- Price: £189.00 (checked on Amazon UK on 2026-09-07)
- Amazon rating: 4.6 from 85 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0FH621318?tag=ranked10-21

The WELOCK U81 is our number five smart lock pick for September 2026 and the best documented handle replacement for British PVC doors. It fits 50 to 95 mm doors and unlocks six ways, with weatherproofed biometrics rated from minus 25 to 60 degrees. The listing records 85 ratings at 4.6.

Everything on this page comes from the Amazon listing rather than our own testing.

## Specification

| Field | Value |
|---|---|
| Fit | 50-95 mm doors, no drilling |
| Entry | Fingerprint, code, RFID, app, key, Alexa |
| Weather | Minus 25 to 60 degrees |
| Security | Anti snooping, 3 minute lockout after 5 errors |
| Auto lock | 5-14 second delay, customisable |
| Remote | Needs separately sold WELOCK WiFiBOX3 |
| ASIN | B0FH621318 |

## Questions people ask

**Which doors does it fit?**

PVC, wooden and narrow frame doors 50-95 mm thick.

**How many ways can I unlock it?**

Six: fingerprint, passcode, RFID card, app, mechanical key and Alexa.

**Is it weatherproof?**

Yes, rated for UK weather from minus 25 to 60 degrees.

**Does it need drilling?**

No, the listing says installation needs no drilling or cables.

**Can I use it remotely?**

Only with the separately sold WELOCK WiFiBOX3 gateway.

**What is the rating?**

4.6 across 85 reviews.