Forget carrying around keys; unlock your home using a 4-8 digit PIN code on the backlit, push button keypad. Create up to 25 (250 with a Network Module) PIN codes to share with friends and family so you'll never have to lend a key. The keypad has backlit numbers that won't wear off. Lock the door behind you by pressing any key. The lock is packaged with two matching keys for you to have, just in case. The Assure Lock is simple to install on standard doors and replaces your existing deadbolt in minutes with just a screwdriver.