The JBL Partybox Ultimate is the largest JBL party speaker. The speaker supports Dolby Atmos, so you can enjoy spatial audio. That way, the music sounds like it's being played live. Thanks to the built-in light effects, you can add extra atmosphere to the party. You can choose the light show you want with the buttons on the speaker. For an evening with even more music, you can plug a guitar or microphone in the speaker. Want to sing along to your favorite songs with friends? Choose the bundle with 2 wireless microphones.