This Kwikset arch electronic deadbolt is for use on exterior doors where a keyed entry and security are needed. Featuring a satin nickel finish and an arch shape, it has a lighted keypad which stays lit for 5 seconds after inactivity. Plus, it offers a customized automatic door locking after 30 seconds. This product is easy to install with just a screwdriver. It is covered by a limited lifetime mechanical and finish warranty, as well as a limited 1-year warranty on electronic parts. Requires 4 AA batteries (sold separately).