The Cirago IAT1000 iAlertTag is the solution to keep you from leaving your iPhone or iPad behind. The iAlertTag creates a link with your iPhone/iPad; when separated at a distance, both the tag and your iPhone/iPad would produce an alarm sound, and vibrate in the case with an iPhone. The iAlertTag is based on the latest Bluetooth 4.0 Low Energy technology, the lightweight compact tag is extremely energy efficient. Under normal usage, the tag can be used for about one year before the need to replace the battery. iAlertTag comes with a free companion app which you can download from the iTunes store. The iAlertTag app allows you full customizations, such as selecting alarm sounds for the tag. Benefits and Features: Keeps your iPhone/iPad with you Finds your iPhone Free app for full customizations Works with Bluetooth 4.0 enabled iPhone and iPad: iPhone 4S, iPad (3rd Gen), and newer versions