You'll want an alarm, just like any other home security system, to not only repel burglars but also to alert you if someone is attempting to break in. Smart locks do not come with built-in alarms, so you'll have to purchase one separately. However, some smart locks give out automated notifications, so if someone opens your door while no one is supposed to be there, you'll get a push notification. You can investigate immediately from your phone if you have a video stream inside or outside your door, such as a smart doorbell camera. Now is the time to visit Yale Lock's website to learn more about their top-of-the-line home security systems and products.