feature | Multi-function: This 120 degree adjustable Bluetooth FM transmitter enables you to do handsfree calls, listen to music, and it can support USB drive and aux input, charge your device and monitor the voltage of car battery.New Generation Bluetooth Transmitter with advanced design and quality. With inbuilt intelligent charging recognition chip. Output voltage is DC 5V, 2.1ATwo-way Plug USB Charging: Different from ordinary usb, they are bi-directional ports. you can plug your cable either way to c |