Schlage FE51 PLY 505 605 CAM Built-in Alarm, Camelot Collection Plymouth Keyed Entry Knob Door Lock, Bright Brass Resistant to pick and bump security attacks, certified as meeting ANSI Grade 2 standards-one of the highest security ratings in the industry Easy to use: Programming done right at the lock Guaranteed fit on exisiting pre-drilled doors, installs in just 5 minutes with a screw driver - no wiring required Two AAA batteries (included)-with three-year battery life-and low battery indicator Lifetime limited warranty on mechanical components and finish, one-year electronics warranty