Turn any road trip into a musical trip with this Bluetooth FM transmitter. It can play music from your smartphone/tablet through Bluetooth or directly from your microSD or USB port. You can mount it easily on your lighter support and use it to fast charge your smartphone/tablet with its QC3.0 USB port. The B7 transmitter remembers the last played song and FM frequency before shutting down and takes good care of your hands-free calls with its noise suppression and echo cancellation in-call functions.