Deep, resonant sound elevates your favorite music with the XB43 wireless speaker. The newly designed X-Balanced Speaker Unit gives the EXTRA BASS™ power of the XB43 a crisper, fuller sound and two new tweeters for clearer vocals. The IP67 waterproof, rustproof and dustproof design means you can listen anywhere, indoors or out, with up to 24 hours of battery life.