Features: 1. Invisible fingerprint unlocking smoothly, FPC semiconductor fingerprint living biometric technology, effectively preventing fake fingerprints. 2. Multiple unlocking methods, Fingerprint + Card Swipes + Password or Card Swipes + Password, to meet your different needs. 3. False privacy password design, you can enter garbled characters before and after the correct password to avoid being remembered. 4. Long endurance, 4 x AA battery powered, with USB interface, can be external USB power bank to handle the emergency. 5. No wiring, can be installed in a few minutes, applicable glass door 10~12mm thickness, please check your door size before purchase. Specification: Material: ABS Product Color: Black Product Size: 68 x 38 x 170mm Product Weight: 1150g Battery: 4 x AA Battery Fingerprint Capacity: 50 Card/Password Capacity: 1000 Applicable Glass Door: 10~12mm Thickness Optional: Fingerprint + Card Swipes + Password, Card Swipes + Password Package Included: 1 x Smart Door Lock 2 x Cards