Dive into the front row of a concert with the ULT POWER SOUND series. Built for music lovers, it produces powerful deep sound designed to make your heart tremble. With the Sony ULT FIELD 1 Bluetooth Wireless Portable Speaker, experience enhanced bass and powerful sound built into a compact package. Enhance your low-end frequencies for exceptional bass that will make your heart tremble. Enjoy booming bass and powerful sound in a compact package. Complete with a multi-way strap for ease of use, take your waterproof, dustproof, and even shockproof speaker anywhere for longer, thanks to a long battery life.