IP67 Waterproof/Dustproof Rating] Unlike most speakers, the Aolaifo S-169 has an IP67 Waterproof/Dustproof Rating, so it's completely protected against dust and will function normally even if it's dipped in water to a depth of 1 meter (3.1 feet). [Rugged Solid Design] Your active lifestyle has just met its match. Splash proof, dust proof, drop proof, shock proof, the rubber encased Aolaifo S-169 is built for durability in harsh environments. [12 Hours of Playtime] Built in high capacity rechargeable battery allows uninterrupted music all day. Automatically power off when Bluetooth disconnected over 10mins, effective energy conservation [2 x 3W Audio Drivers] High quality full range speakers equipped with a passive subwoofer and dual 3 watt audio drivers (total 6 watts), which deliver rich bass and sound quality that you crave. [Advanced Bluetooth 4.1] Latest Bluetooth technology offers high compatibility to pair with Bluetooth devices from up to 33 feet away.Shenzhen Hualong Sun Rising Co.Ltd