Scosche's BTFM4 universal Bluetooth hands-free car kit lets you make hands-free calls and wirelessly stream music from your Bluetooth-compatible device to your car radio with crystal clear, crisp sound. You can stream audio files through your device's Bluetooth. The digital LED display shows the exact frequency the station is tuned to for easy synchronization with your vehicle's stereo. The car charger's dual 2.4 + 1-A USB ports plug into any 12V power port on the vehicle to power the BTFREQ and charge your device at the same time. The convenient LCD display design provides an easy-to-read interface so you know exactly which station or frequency the BTFREQ is tuned to. It's easy to synchronize. Simply find an unused FM frequency in your vehicle's stereo and match it to the FM transmitter. With BTFREQ FM transmitter, you can easily use Siri and Google Voice on your device. With the remote control of the FM transmitter, you can safely and conveniently switch between radio stations, play / pause music or switch between the previous or next track. Scosche BTFREQ universal Bluetooth hands-free car kit and FM transmitter are compatible with your iPhone, iPod, Android, MP3 player, Bluetooth or any other compatible Bluetooth device. Perfect for use in your vehicle when you want to make hands-free calls, listen to music every day, or go on a long road trip!..