1. High strength aluminium alloy material, corrosion resistance. 2. 4200mAh lithium battery power supply, reusable charging, environmental protection. 3. 300 fingerprints, password, IC card can be input. 4. After closing the door, the latch will pop out and lock automatically. 5. The door can be opened with key in any condition. 6. Even if the power is off, the fingerprint, password and IC card data will not be lost 7. The alarm will sound automatically when the power is low, and the alarm will also be given if theunlocking is unsuccessful for many times. 8. If battery is power off, there is USB port as emergency charge.