Introducing Sony's new EXTRA BASS™ wireless speakers with deep and punchy bass - SRS-XB41, SRS-XB31, SRS-XB21. The new LIVE SOUND mode brings your party to life with a three-dimensional sound experience. Enjoy the freedom to take these speakers anywhere as they are waterproof and dustproof with an IP67 rating. They are even rustproof so even if you accidently drop them in the ocean, they will survive. Being so compact alongside a 24 hour battery life* (for SRS-XB41 and SRS-XB31. 12 hours for SRS-XB21), you can bring EXTRA BASS™ sound anywhere and the party can carry on all night long. Use your speaker like an instrument to create the perfect party vibe with the new Party Booster. You can tap your speaker in different places to make different sounds - like a scratch, snare, kick drum, cowbell, etc. Just tap and enjoy!