QC3.0 Quick Charge Clydek Bluetooth car fm transmitter supports 4 music playing modes, including A2DP, U disk and Aux line. The adapter’s built-in microphone can be used to play music without any cables or wires. It also has a built-in battery backup feature that allows you to charge your phone in the car. The adapter is compatible with all major smartphones and tablets. The adapter will work on both Android and iOS devices. Notably, it was launched by Google in 2015.