>4-way opening: Mifare Card, password, fingerprint and mechanical key

>Voice prompt: All settings can be finished by following voice prompt

>Privacy password: xxx+password+xxx, preventing password to be seen by others

>Passage Mode and Non-disturbance Mode optional

>Auto lock when come across a consecutive invalid passwords or cards

>Low Voltage alarm(?4.5V), doorbell

>Huge storage?50 cards, 50 passwords and 50 fingerprints

>Emergency power supply outside

>Three colors optional

>Zinc alloy material