There's an application You should use with the SoundLink Max, but it's not necessary. If you are doing use it, you will get entry to EQing, speaker customization possibilities, and firmware updates. While it is probably not the most rugged or portable choice, I find the Motion X600 best https://www.bluetoothspeaker.top/qm1-oem-odm-support-bluetooth-speaker-speak-3-7v-2000mah-wireless-music-speaker/