**European standard fingerprint lock Tuya Bluetooth smart lock core - safe and convenient, one-step upgrade**
1. **Core functions**: Support fingerprint, IC card, Tuya Bluetooth APP remote control and mechanical key four-fold unlocking methods to meet the needs of different scenarios. 2. **Widely adaptable**: Designed for wooden doors, office doors, and apartment doors, compatible with door thickness 3.8cm-6.0cm, can directly replace the old lock core of the European standard 5572/3585 lock body. 3. **Sturdy material**: Made of zinc alloy + aluminum alloy, corrosion-resistant and impact-resistant, the lock body size is 255*62*22mm, the lock rod thickness is 87mm, the spacing is 27mm, and the installation is precise. 4. **Dual choice**: S1 black/S1 silver are available, both with fingerprint + card swiping + APP + key functions, 3kg weight, stable and durable.
**Easy management**: You can view the unlocking records in real time through the Tuya APP and authorize temporary passwords, which is suitable for home, rental or office scenarios.
--- **Instructions for use and maintenance** **Unlocking operation guide** 1 Place fingerprint/swipe card close to the sensing area; 2 Click to unlock after APP Bluetooth connection; 3 Emergency backup of mechanical key. **Maintenance tips** Regularly clean the surface with a soft cloth to avoid liquid penetration; lubricate the lock cylinder once every six months to ensure smooth mechanical parts.
