Lose Your Keys. For Good. Lock and unlock your home without the hassle of keys with Twist n' Go when you have your phone, or with a 4-8 digit pin code. Forget lending keys; share digital keys with friends and family using the free Yale Assure app. View access history and battery levels, receive notifications, create pin codes and more all from your smartphone. The lock is simple to install and even easier to use. The Assure Lock can be upgraded with a Yale Network Module to integrate into most home automation and security systems so that you can control and monitor the lock from anywhere. Modules sold on Yale2you.com