1. Defect free, strong sturdy door lock. With k & ks quality certification. 2. Strong & durable body components. Made to withstand heat and electrical shocks. 3. Automatic lock ; relock ; dual lock features. Designed to fit consumer¡¯s security needs conveniently. 4. Random number feature. During pin number authentication, before or after entering pin number add another 4 digits to distract original number sequence. 5. Multi-touch number feature. 3 random number will appear on the screen before actual pin. 6. Multi password ; fingerprint registration function. Password : you can register pin number easily. Guest password : one time usage pin number for guest. Fingerprint : up to 100 fingerprints can be registered. 7. Auto cover authentication. The sensor cover opens and closes with just one touch for convenient authentication. 8. Adjustable volume setting with muting features. Sound can be adjusted in 7 levels depending on user¡¯s choice. 9. Highly visible white light button. Highly visible white light button for easy viewing even in dark places. 10. Emergency battery function (9v battery) when the battery is discharged, initialize the lock outside by using a 9v battery. 11. Anti-shock ; anti-fire ; anti-hacking system. Aside of anti-shock and anti-hacking feature, there is the anti-fire feature designed for internal safety, when the inside temperature rises above the normal temperature and the heat sensor detects this, it will sound-off a loud alarm, and the door will automatically unlock. 12. Sub-type door lock. No handle type door lock.