Secure, keyless entry to your smart home. Lock and unlock your door with your phone. Give keyless entry to family, friends, and home services without worrying about lost or copied keys. August Smart Lock Pro attaches to your existing deadbolt so you can still use your regular keys. With our proprietary DoorSense technology, you’ll know your door is completely closed and locked. It’ll even lock itself when you leave. Works with Apple HomeKit & Z-wave wireless home control technology.