The Latest Bluetooth V5.0Compared with Bluetooth 4.2, Bluetooth 5.0 has: 2x Data Transfer Speed, 4x Transmission Range, 8x Broadcast Massage Capacity, much better audio quality, also compatible with V1,V2,V3,V4,V4.1, V4.2. Three Music Playing ModesYou can enjoy clear and stereo sound music via Bluetooth/ USB Flash Drive (32GB) / microSD Card(32GB) on this car audio transmitter. Long press the "NEXT" button to switch the playing sources. MP3/WMA/FLAC/APE/WAV format music is supported.Hands-free CallingFeaturing echo cancellation and CVC noise suppression technology, the Bluetooth FM transmitter can provide you with a smooth and clear calling. Just press the FM''Phone'' button to answer/ hang up/ reject/ redial calls, seamlessly switches between incoming calls and music. your hands can be free for safe driving.QC3.0 Fast ChargingThe FM transmitter supports QC3.0 fast charge, which charges 4 times faster than traditional charging ports. and another USB charging port (5V/1A) also functions as a U disk port up to 32GB. Share the charging port with your friends while traveling.Easy Setting Plug this car audio fm transmitter into the cigarette lighter socket, set the Car FM Radio to an empty station (76.0-108.0 MHz) and tune the FM Transmitter to the same frequency. Pair your phone and fm transmitter via Bluetooth, and then enjoy your music.