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. Prepare to feel the bass. 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.