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 and one 9V battery (included)-with three-year battery life-and low battery indicator * Lifetime limited warranty on mechanical components and finish, one-year electronics warranty