We needed to replace a lock on the front door of our mobile home. We wanted one that was easy to operate and would not always need a key for. The lock comes with everything needed to install, even the template to cut the hole in the door. It took around an hour for the complete install. Using your smartphone, you can download the app that lets you lock and unlock the door. It is really simple to set up the app. You can use the app, the keypad, or the provided keys to open the door from the outside. Inside you can use the app, or the knob to unlock the door. The lock is aesthetically pleasing inside and out.