MOBILE APP - Download the iKey app from your preferred app store and then using a Bluetooth connection you can easily lock and unlock your door with a press of a button KEY PAD - Create personalized 4-8 digit access codes and assign different codes for multiple users KEY ACCESS - You can always rely on the included keys to unlock and lock your door should the batteries run out AUTO-UNLOCK - Hands full? No issues with the auto-unlock feature. Using bluetooth and iKey Lock app, when you approach the door, it can automatically unlock allowing you to enter with ease VACATION MODE - If you're leaving for a while, you can set to Vacation mode, which disables all other entry codes, leaving only the admin code active to give more security while you're away