The BungeeAir has three main features: Remind, Secure and Find. The Remind feature sends an alert to the fob in case the user has accidentally left their phone somewhere. The distance when the alert is triggered can be adjusted by an app on the iPhone.
The Secure feature automatically locks the iPhone and activates the password screen, preventing easy access to the iPhone, if it is separated from the fob.
Finally, the Find feature allows users to find their phone -- or the fob -- simply by pressing a button, if they are within range of each other. When activated, the devices alarm with sound and vibration.
Kensington doesn't precisely specify the wireless technology used, instead claiming a "2.4 GHz wireless connection" between the case and the key fob.
Kensington offers two versions of the BungeeAir, one with a 4-hour iPhone backup battery for $99.99, and the other as just a standard case for $79.99.
The BungeeAir companion app is free on the App Store.