This keyless entry system is design to be used on your Smartphone – yes, any smartphone is compatible even the older ones just use a simple text command message. And It works anywhere in the world. If you have an Iphone 4S or higher, you can use the sense system to automatically open the door as you approach it. The batteries last up to a year and when its running low it will notify your smartphone. Even if you are a renter you can use this product, it simply can be easily remove once you decide to get up and move. Share access to friends, family, or roommates. When the door is unlocked by someone other than you, you can be warned – or notified. Keep your peace of mind with this intuitive app that provides plenty of features and is easily customizable. Stop using your traditional lock system and check this out.