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. Enjoy faster data Transfer Speed and much more stable connection between a device and the audio receiver with Clydek upgrade FM transmitter. . 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. .