The onn Wireless FM Transmitter and Car Charger helps you stay connected and powered while on the road. Stream music podcasts and phone calls from compatible devices directly through your vehicle s FM radio using Bluetooth wireless technology. The built-in microphone supports hands-free calling while USB flash drive and microSD card playback provide additional ways to enjoy your favorite audio content. USB-C and USB charging ports help keep compatible devices powered during your drive allowing you to stream audio while charging at the same time. Make every trip more convenient with the onn Wireless FM Transmitter and Car Charger.