The Armor All Bluetooth FM Transmitter and Car Charger allows you to expand your existing audio setup. Connectable to your DC port, you can stream music from compatible devices to your car stereo instantly. The transmitter utilizes the existing FM radio frequency to match to Bluetooth signals. You can also make and receive hands-free phone calls and avoid distracted driving, There’s also 2 USB ports to recharge compatible items if they’re running low on power. Listen to your favorite songs while you drive with the Bluetooth FM Transmitter and Car Charger.