1.Bluetooth FunctionBluetooth and microphone allow you to answer callings, listen to music and media sounds from devices with Bluetooth function. Once you pair your device it will automatically connect next time you get into your car. 2.Connect 2 Phones Simultaneously You can connect 2 phones at the same time. Once the Bluetooth match is made, it will be automatically made next time. 3.Superior SoundIt can insert SD card. You can download songs to your USB or SD card. It can make you enjoy the clear stereo sound in the car with your family, friends,etc. You can use it on car sun visor, indoor and outdoor. 4.High Quality Sound This speaker with noise suppression technology and high quality design offers high-resolution hands-free functions and excellent music. Excellent technology to reduce all driving noise. You can enjoy very high quality music in boring driving. 5. Unique magnetic chamber base design Multimedia Bluetooth speaker for many occasions