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. (1time entry password available) 4. Up to 100 Smart cards can be registered 5. One touch Close 7. Operate with 9V battery from outside when internal battery is discharged 6. Detects fire from inside the house, when temperature rises above normal, it will 7enerate an alarm and automatically unlocks the door 8. Will sense and generate anti-prank and force break-in alarm 9.Can use for sliding door / double door