BATTERIES NOT INCLUDED! These electronic deadbolts are quickly becoming a popular item. Folks like the idea of having an alternative way to enter their house just in case they forget the key. Most of them are around a hundred bucks (or less) and you can choose to keep your existing lock set to save some money. This particular model will hold up to four different codes (4-10 digits) and runs on four standard AA batteries (which should last over a year). I have a flat rate for installation of this deadbolt. 419-212-3200