3-way opening: Mifare Card, password 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
Emergency power supply outside
Three colors optional
Zinc alloy material