DescriptionDescription 1. Dual USB Ports: Bluetooth car charger with 2 USB charging ports to charge most USB devices. You can charge 2 devices (IOS or Android) at the same time. A music icon for the USB port is used for reading USB sticks but also for charging your device. 2. Hands-free calls: Built-in microphone of the FM Bluetooth transmitter adapter to automatically switch music playback to hands-free mode when answering a call. One press to answer/hang up the call. Convenient and safe for driving. 3. High quality: The FM transmitter more stable FM signal, advanced noise reduction technology - CVC technology produces full-duplex sound and suppresses noise and wind, enhancing the using experience and improving interference performance. 4. Universal Compatibility: Wireless FM transmitter, support mobile phone A2DP function, work with SD, TF card and USB, listen to music while charging. Compatible with iPad, iPhone, Samsung, Google, LG, Tablets, Andorid or other devices with Bluetooth connection. 5. Easy to use: The Bluetooth FM transmitter is simply connected to the car cigarette lighter and connected to the car radio or smartphone paired. Then it could be automatically searched and connected to your device next time if the device is connected before.