The most important is the ability to lock and unlock doors with the mere tap of an icon. Another useful feature is the possibility to add different types of users and assign permanent or temporary permissions for them. For instance, if your cleaning lady comes every Tuesday and Friday, you might want set up a specific access schedule for her, allowing her to enter the house only on those specific days and at the agreed hour. Another aspect worth taking into consideration refers to activity logs for those cases when you want to see who entered or exited your home. This usually comes with the option to set email or SMS alerts in case of a forced entry. Voice activation is another interesting feature, allowing you to lock or unlock your door with a voice command that you have set yourself. If you have the habit of constantly wondering whether you locked the door or not, you might be interested in getting a smart lock that provides a geo fencing feature. This way, you can create a setting that enforces doors locking when you get away from your house. A similar setting can ensure automatic door locking when inactive for a specific period of time. Some smart lock products are Bluetooth enabled. What you have to know before purchasing such a product is that you will have to be within a certain range in order to be able to communicate with your lock.