Schlage's Innovative Turn Lock feature allows you to lock & leave without a key Provides the convenience of keyless access; customizable to fit your security needs Ideal for front doors, side & back doors, garage entry doors, etc. Easily replace most exisiting deadbolts with a screwdriver in about 30 minutes No programming required; preset with two user codes so it's ready to use right out of the box Convenient keyless access; no keys to hide, lose or forget Pre-set with random 6-digit programming code and two random 4-digit user codes 19 user code capacity; 10,000 user code combinations Easily programmed right at the keypad; no need to remove inside escutcheon Blue LEDs illuminate the keypad on demand Locks can be re-keyed to match existing locks 9-volt alkaline battery included