Light-up your sound with the Altec Lansing Mini LifeJacket Jolt. This IP67-rated EVERYTHING PROOF® speaker has built-in LED lights that beat sync to your music or simply illuminate one solid color. With up to 16 hours of playtime, this speaker will immerse you in sound for hours. Never worry about your smartphone device losing battery life - this speaker has a built-in USB smartphone charger to keep you powered up at all times! Need more sound? House Party Pairing allows you to connect multiple speakers at once and create multi-room surround sound.