Compatible with most standard doors 1.38 in. to 2 in. thick - universal fitment with both right-swing and left-swing doors and installs with standard tools in 10-minutes to 15-minutes. Highly secure keypad worlds first patented peek-proof keypad, displays an always shuffling set of numbers across 4 buttons and is different every time, so while your access code remains the same, the location of the numbers differs, making it near impossible for prying eyes to guess the correct code/ Convenient keyless entry lock/unlock and manage your door access with your iOS/Android smart phone or by entering a preset access code on the digital keypad, backup physical keys and backup power options included in case of emergencies. Advanced 3D fingerprint sensor - store up to 99 fingerprints and detects physical fingers only, preventing the use of copied or lifted fingerprints. Zinc alloy built lock with a rust and corrosion resistant matte black finish backed by a lifetime finish warranty. Auto lock feature - custom auto lock feature can be set to automatically lock your phone 5-seconds up to 5-minutes after unlocking, making sure your deadbolt is always secured. Long-lasting power: powered by 4 AA batteries (included), the Lockly secure smart lock lasts up to 1-year on normal use, low battery warning can be viewed on your app, all mounting hardware included. Limited 5-year mechanical and finish warranty and 2-year electronics warranty.