Fingerprint Unlock: Identifies your fingerprint within 0.3 seconds and unlocks your door within 1 second, with a 99.99% recognition rate [4-in-1] Unlock: Fingerprints, codes, one-time codes, and keys can all be used to unlock Keypad Door Lock with Handle: Features a fingerprint keypad deadbolt combined with 2 knobs, anti-peeping codes, backlit keypad, low battery alerts, mute mode, and vacation mode Built to Last: The ANSI Grade 3 fingerprint door lock is made with a sturdy lock cylinder and alloy, powered by 4 AA batteries, and lasts for more than 1 year Smart and Convenient: Set the front door lock to "auto lock" in 10-99 seconds, or press any key for 2 seconds to lock the door manually Easy to Install: With just a screwdriver, you can easily finish installation and programming in minutes. It is compatible with all American standard left- and right-handed doors US-Based Lifetime Support: Veise offers at least a 2-year warranty, lifetime US-Based professional phone support (Weekdays 9 AM–5 PM PST), and 24/7 after-sales email service