Wireless and To-Go Easy connection with your electronic devices wirelessly and use it portably. The wireless working range is around 8-10 meters (30 feet), no cords and no hassle. Hand free calling on-the-go With a built-in microphone, the unit takes on your calls just free and easy. 2-in-1 design for use in bicycle and backpack Carabiner and bicycle bar mounter with bracket are provided for two uses in carrying it over. Bluetooth box for water and splash-proof bikes and bikes with FM radio, speakerphone function and micro SD card reader for up to 10 hours of playback.