iSimple Vehicle Bluetooth 5.0 FM Transmitter lets you enjoy music, make hands-free calls, and charge devices in your car. It features Bluetooth 5.0 for stable connection, FM transmission to play audio from your phone or USB/SD devices, and a Type-C PD 18W port for fast charging. Answer/reject calls, switch music tracks, and adjust volume with the multifunction knob. The backlit LED display shows battery voltage, FM frequency, and more.