WINNER! 2007 Consumer Electronics Show Innovations Award With the of thousands of US consumers as well as multiple well-respected US locksmiths and security firms, Bio Axis has created a deadbolt lock that truly accomplishes a rare blend of beauty and security. We have sourced the highest quality components for the Bio Axis BD1 to redefine the standard for biometric door locks - ANSI-certified mechanics, 100% weatherproof construction, solid brass deadbolt with case-hardened steel roller pin, and an unprecedented 2 year warranty, to name a few. Five pin tumbler rekey able KW1 keyway (for emergencies), as compared to most biometric locks with proprietary keyways Includes three nickel plated brass keys Solid brass cylinder plug One inch brass deadbolt with case hardened steel roller pin to resist sawing, as compared to hollow tin deadbolts for most other biometric locks Each lock package includes one 60mm and one 70mm backset, as compared to more damage-prone adjustable backsets Certified heavy-duty deadbolt High-quality motor is rated for 800,000 operations Weatherproof - Fully resistant to rain, snow, temperature extremes, humidity, UV and dust. No other biometric deadbolt can make these claims Two Year Warranty - as compared to most locks with a one year warranty Deadbolt is mounted internally through the door for better security, as opposed to externally on the door like many other biometric deadbolts Impact Alarm. For even greater physical security, if an intruder attempts forced entry (bump key, crowbar, etc), a high-pitched impact alarm will sound Non-Handed - will fit any left or right handed door Additional security added with keyhole cover Up to 30 users Sliding weather cover triggers sensor to power on automatically. Sliding weather cover also triggers deadbolt to re-engage (no tricky s to push or PIN Codes to recall) Battery operation with low battery alert - non-volatile memory