Electrifying sound with AI Sound Boost Futuristic lightshow: Did someone say lightshow? Dance the night away with glowing light patterns and strobe effects that make any event a whole mood. Up to 15 hours of play time: Multi-speaker connection by Auracast: Bigger parties call for even bigger sound. Pair two PartyBox 520s for true stereo vibes via Auracast, or connect multiple JBL Auracast-enabled speakers wirelessly and let your music grow with your party size. Control your party, right from the JBL PartyBox app: Don’t feel stuck on speaker babysitting duty. Control your music, EQ settings, and lightshow from the JBL PartyBox app, wherever the party takes you.