DUAL USB PORTS - The USB Charging Ports allow you to simultaneously charge several devices. Utilize the 5V/3.1A connector for quick charging of your smartphone, tablet, and other devices, and the 1.0A port for reading and playing music from USB flash drives.WIRELESS HANDS-FREE CALLING - When you press the button to answer a call, the device will instantly switch from hands-free to music-playing mode. Through the built-in microphone, speak hands-free.WIDE COMPATIBILITY - The majority of Bluetooth-enabled smartphones, including the iPhone, Samsung Galaxy, Sony, Nokia, Google, HTC, and other brands, are widely compatible with this product. may be utilised with MP3 and MP4 players as well.THREE PLAYING MODES: The Bluetooth Car Adapter offers three different ways to broadcast high-quality audio. 1. A 32GB USB flash drive. 2. A 32GB TF Card inserted into the Card Reader. 3. Bluetooth Connectivity.