3 Pack Ultraloq UL3 Fingerprint and Touchscreen Keyless Smart Lever Door Lock (Satin Nickel) All-in-one Flexibility, 95 fingerprints, 95 codes and 3 backup mechanical keys. Easy Setup and DIY Installation; Fit Door thickness between1-3/8"~1-3/4. 3 ways to unlock, Fingerprint, Code or Key; One Finger Touch Open in Less than 0.5 second. Durable, waterproof and dustproof fingerprint sensor; Heal broken fingerprint lines; Works well for kids and the elder. Long Battery Life, Up to 8,000 times access. Low battery alarm on LCD.