The JBL PartyBox 310 is a large battery-powered speaker with circular RGB lights. It has a slightly boomy sound profile suitable for a variety of music. It has a Bass Boost feature to add even more thump and punch, and you can customize its sound to your liking using the graphic EQ in its companion app. It's suitable for musicians as it has a mic and guitar input alongside bass, treble, and echo controls for the mic. It can get very loud, although there's a bit of compression at max volume.