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. Operate with 9V battery from outside when internal battery is discharged 5. Detects fire from inside the house, when temperature rises above normal, it will generate an alarm and automatically unlocks the door 6. Will sense and generate anti-prank and force break-in alarm
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