General description This Dual USB Ports Wireless MP3 Music Car Charger is designed to enhance your driving experience by allowing you to charge two devices simultaneously while enjoying high-quality stereo music. With Bluetooth 5.0 technology, it provides seamless connectivity for hands-free calling and music streaming. Technical specifications USB Ports: 2 (1 x 5V/1A for music, 1 x 5V/2.4A for charging) Bluetooth Version: 5.0 Music Playing Modes: Bluetooth connection, USB Flash Disk Built-in Microphone: Yes, with echo cancellation and noise suppression (CVC) technology Usage Charge two devices at once with overcharge protection. Stream music via Bluetooth or USB Flash Disk. Make hands-free calls using the built-in microphone. Control calls with a multi-function button: answer, reject, hang up, and redial. Automatically switch to hands-free mode when receiving calls. Other information Blue ambient light for easy visibility in dark environments. LED screen displays volume, car voltage,