Bluetooth adapter for car with FM transmitter and dual USB ports1、Hands Free Calling: Connect cellphone and this adapter via Bluetooth, to answer, redial, hang up. Keep your attention focused on the road and keep driving safe. 2、Unique Function: With automatic shutdown memory, on the next boot, it will remember the last connected device and continue playing where the audio is cut off. 3、Dual USB Charging: Designed with two USB charging ports, one output 3.1A and one output 1A, you can charge your phone or other devices at the same time. 4、Music Player: Connect to FM channels by connecting the car radio and this Bluetooth adapter. Then you can enjoy music from Bluetooth devices or USB flash drive to the car stereo. 5、Stable Transmission: Using Bluetooth Smart 5.0 chip, advanced Bluetooth technology can ensure that mobile phone connection and transmission are more secure and more stable.