Bluetooth V5.3 & Handsfree Car Kit With an advanced Bluetooth V5.3 chip, this FM transmitter Bluetooth provides faster pairing and more stable sound than others. Built-in microphone will automatically switches from music playing to hands-free talking when answering a phone callRapid ChargingQuick Charge with 2 USB PortsCharge 2 devices simultaneously with our Bluetooth car adapter. The QC3.0 port is able to charge the phone up to 100% less than 40 mins, and the other USB charging port (5V/1A) also functions as a U disk port.Clear Sound Just find an unoccupied station and the boosted FM signal and static-cancellation technology broadcast a great listening experience.Hands-Free Calling Bluetooth provides a stable connection, while Noise Suppression (CVC) technology and echo-cancellation grants an amazing hands-free calling experience. Besides, you can also get clear voice navigation from your phones app, which means driving will be more safely.