Stream audio from your mobile devices through your truck or car FM radio without the need for complex wiring or installation. Add safety and convenience to your next road trip with this FM transmitter. It includes a large LCD display for easy viewing and Bluetooth technology for hands-free calling or listening to your favorite playlist or podcast from device through your vehicles radio. This Bluetooth FM transmitter combines the functionality of an FM transmitter with Bluetooth technology. Simply pair it with your mobile device can you can receive audio signals from your device and convert them into FM radio signals. Tune your vehicle FM radio to the same frequency that this transmitter is broadcasting on and you will hear the audio from your mobile device through your car or truck speakers. This is especially useful for vehicles that do not have built-in Bluetooth connectivity or auxiliary input ports. This can be powered by your cigarette lighter or USB port and is small and portable. Use as a 12V adapter as well to charge mobile devices while off grid. Easily move it from one car to another. Includes a built-in hands-free microphone. The 12V plug includes a pass-through 2.1A USB port and large LCD. Measures 2.5 x 5 x 8.6 inches. MobileSpec 12V Charger with 2.1A USB Port FM Transmitter Hands-Free Mic and Large LED Display Bluetooth Transmitter for Car or Truck Combines the functionality of an FM transmitter with Bluetooth technology to enable you to hear the audio from your phone or other mobile device through your speakers Powered by your vehicle cigarette lighter or USB port for FM transmission and stereo sound while over the road Answer calls and talk on the phone through the transmitter with its hands-free mic feature Wide compatibility to work with devices like iPhones or Androids and other smartphones that have Bluetooth capability