There's an application you can use with the SoundLink Max, but it isn't really obligatory. If you need to do use it, you will get use of EQing, speaker customization choices, and firmware updates. It’s just like the size of the small clutch bag, with an extremely small strap https://www.bluetoothspeaker.top/bluetooth-wireless-speaker-audio-stereo-tf-card-mobile-phone-support-universal-battery-powered/