1. Durable metallic body against external shocks and fire 2. Auto-lock, Re-lock, double lock function for user convenience and security 3. Random Number and Multi-touch features that enhance password security.(1-time entry password available) 4. Up to 200 Smart cards can be registered 5. In case of emergency, use the mechanical key to open the door 6. One touch Close 7. Operate with 9V battery from outside when internal battery is discharged 8. Detects fire from inside the house, when temperature rises above normal, it will generate an alarm and automatically unlocks the door 9. Will sense and generate anti-prank and force break-in alarm 10. Mobile Application Bluetooth, Home Network module, Remote control (optional)