<p>Hands-free: CallingUpgraded car FM transmitter with a built-in microphone. It will automatically switch from music playing to hands-free talking when answering a phone call. Convenient one-button control makes driving safer.</p> <p>Easy Setting: Plug this car audio FM transmitter into the cigarette lighter socket, set the Car FM Radio to an empty station (87.5-108.0 MHz), and tune the FM Transmitter to the same frequency. Pair your phone and FM transmitter via Bluetooth, and then enjoy your music.</p> <p>Siri and Hands-free Calls: This Bluetooth FM transmitter supports Siri for voice guidance, like sending texts, incoming phone numbers, or driving directions. noise-cancellation technology dampens the road noise and gives you clear, crisp sound for hands-free calls.</p> <p>Wide Compatibility: This Bluetooth adapter car can be used with any Bluetooth device such as iPhone, iPod, HTC, Galaxy, Sony, tablet, and Android Smartphones. And it fits 12V-24V cars and trucks. Besides, you can enjoy music via Bluetooth/ USB Flash Drive (≤32GB) /SD Card(≤32GB).</p> <p>Safe Protection and Wide Compatibility: This car adapter is designed with over-current protection, over-voltage protection, short circuit protection, and a built-in smart IC. All of these can prevent many unsafe problems. It is compatible with most Bluetooth-enabled devices, It also fits all vehicles (12-24V). Connector type: USB 3.0.</p>