about this article Latest Bluetooth V5.0 Compared with Bluetooth 4.2, Bluetooth 5.0 provides: 2 times the data transmission speed, 4 times the transmission distance, 8 times the transmission massage capacity, better sound quality, and compatible with V1, V2, V3, V4, V4.1 , V4.2. Enjoy faster data transfer speeds and a more stable connection between your device and audio receiver with the FM transmitter. Three Music Playing ModesUsing this car music player, you can play clear stereo music via Bluetooth/USB flash drive (32GB)/microSD card (32GB). Press the "NEXT" button to change the playback quality. Support music in MP3/WMA/FLAC/APE/WAV format. Hands FreeWith echo cancellation and CVC noise reduction technology, you can make calls smoothly and clearly with the Bluetooth FM transmitter. Just press the FM "Phone" button to answer, hang up, reject or redial, and seamlessly switch between incoming calls and music, freeing your hands and driving safely. Two USB PortsThis bluetooth FM transmitter has two USB charging ports, a fast charging port (5V/2.4A) for efficient device charging and a standard charging port (5V/1A) with music notation, For reading USB U media up to 32 GB. You can also charge two devices at the same time. Enjoy stereo streaming in your car while charging your phone. Easy SetupConnect this FM transmitter to a cigarette lighter, set the FM car radio to a blank transmitter (76.0-108.0MHz) and tune the FM transmitter to the same frequency. Pair your phone with an FM channel via Bluetooth and enjoy your music.