1) Anviz optical sensor, reliable performance 2) Elegant and stylish design 3) White LCD display, user-friendly interface 4) Ripeness circuit system and good stabilization 5) Power-saving function: Be dormancy if fingerprint fails for 5 times or no Operation for 5 seconds 6) Automatic door opening function 7) External battery is available if internal battery runs out 8) Emergency mechanical key in case of malfunction 9) Material: S45C 10) Dimensions: 400 x 250 x 240mm (can be customized) Two working modes: 1) Hotel mode: A) Fingerprint capacity: 1 B) Automatic fingerprint removal every time door is opened C) No need for hotel staff to delete fingerprints manually when users Leave 2) Home mode: A) Fingerprint storage capacity: 8 B) Management: 2 administrators, 6 common users C) Three-function key: Start, add and delete for easy operation