Vtin Bluetooth 4.0 Portable Bluetooth Speaker 20W with Improved Exceptional Battery Life and IPX4 Water Resistant High Stereo Sound. Dual ten-watt drivers offer impressively clear, crisp sound. Loud enough to fill a large room,allowing you enjoying a clear, well-balanced, full range listening experience. Improved Exceptional Battery Life. Can keeps music going for up to 25 hours at the volume of 70%. Built-in noise-cancellation mic for clear hands-free calls. Splashproof & Crashproof. IPX4 waterproof design makes it safe for poolside,beach or a rainy camp day. Crashproof and robust construction ensure durability. The alloy aluminum hook makes it portable from here to there. 20 watt Drivers. Powered by dual 10 watt subwoofer drivers.Enjoy yourself! Be Safe with Vtin.Every product from Vtin enjoys 45 days money-back and 12-month warranty. We also have a professional after-sale service team to make things right within 24 hours.