BLUETOOTH HANDS FREE CALLING: Make hands-free calls from your Bluetooth enabled Smartphone. DIGITAL DISPLAY: LED Displays the exact frequency the transmitter is tuned to for easy syncing with your vehicles stereo system. WIRELESS MUSIC STREAMING: Wirelessly Stream music from the Digital FM transmitter to your vehicles FM stereo. BUILT-IN CHARGER AND CONTROLS: Charge your devices with the Dual 2.4 + 1AMP USB ports on the 12V car charger and change music tracks forward/back, play/pause, answer/hang up the phone or voice controls like Siri and Google Voice. COMPATIBILITY: Works with all iPhone, iPod, Android, MP3 Players, smartphones and other mobile devices with Bluetooth. Backed by Scosche’s Lifetime Tech Support and 3 Year Warranty