Lose Your Keys. For Good. Forget carrying around keys; lock and unlock your home with your smarpthone. Share digital keys with friends and family, view access history and customize lock settings and pin codes, all from your Yale Assure app. For those times when you don't have your smartphone on you, unlock by entering your unique 4-8 digit pin code on the touchscreen keypad. Works With Your Smart Home The Assure Lock with Bluetooth can be upgraded with a Yale Network Module to seamlessly integrate into most home automation and alarm systems. Enjoy the best of both worlds, key free unlocking at the door from Bluetooth and advanced smart home features and remote access with your Z-Wave or ZigBee integrator, such as SmartThings. Modules can be purchased on Yale2You.com.