[The latest Bluetooth V5.0] Compared with Bluetooth 4.2, Bluetooth 5.0 has: 2 times the data transmission speed, 4 times the transmission range, 8 times the broadcast capacity, better sound quality, and compatible with V1, V2, V3, V4 ,V4.1 , V4.2. Upgrade your FM transmitter with Clydek and enjoy faster data transfer speeds and a more stable connection between your device and your audio receiver. Three Music Playing ModesYou can enjoy clear stereo music via Bluetooth/USB flash drive (32GB)/microSD card (32GB) on this car audio transmitter. Long press the "NEXT" button to switch the playback source. Support MP3/WMA/FLAC/APE/WAV format music. Hands-Free CallingThe Bluetooth FM transmitter adopts echo cancellation and CVC noise suppression technology, which can provide you with smooth and clear calls. Simply press the FM "Phone" button to answer/end/reject/redial calls, seamlessly switch between incoming calls and music. QC3.0 Fast ChargingFM transmitter supports QC3.0 fast charging, the charging speed is 4 times faster than traditional charging ports. Another USB charging port (5V/1A) can also be used as a USB flash drive port up to 32GB.