This smart key fob works with most any Bluetooth-enabled cell phones to manage calls and alert you if your phone or keys are left behind. It offers the following functions: wirelessly connects to your phone and answers incoming calls with the push of a button within a range of 30 feet, notifies you when you are separated from your phone or any object to which the key fob is attached, works as a powerful, compact speakerphone while driving or anywhere you go, and acts as an one-touch emergency dialer.