iBOLT Dock'n Drive NFC Tags Compatible with NFC enabled Android phones. Automatically launches the iBOLT Dock'n Drive app. The app can be downloaded for free in the Google Playstore. The Dock'n Drive app has large shortcut buttons, access to any music player, and a speedometer/compass right on the home screen. 2 tags are included for use in the home and in the car. Short lanyard and two-sided tape included for placement.