Universal Compatibility: Compatible with smartphones and pads with Bluetooth function, including iPhone, Samsung, Huawei, Xiao Mi, HTC, Nokia, Google, etc.Handsfree Calls: Enables hands-free calling, allowing you to accept/reject/redial and store calls through the system. CVC technology suppresses surrounding noise for high sound quality and clear calls.Dual USB Charging: Allows charging of two devices simultaneously while driving, with USB-C 5V / 3.1A quick charge/ USB-A2 4.5A PD 22, 5W support.LED Ring with 7 RGB Colors: Displays volume, car voltage, and FM frequency on an LED display, with a colorful ambient light in seven colors for ease of use in dark environments and to create a romantic atmosphere.