Press the ULT button to boost your bass. The Sound Diffusion Processor expands sound in any space.With an IP67 waterproof and dustproof1 rating this speaker is ready for the elements. Shockproof to withstand knocks and bumps.Enjoy music for longer with up to 12 hours of battery life.3 Compact, easy-to-carry design.Detachable, multi-way strap to carry the speaker with you. Four different colors to suit your style.Clear call quality with Echo Canceling. SONY Sony Ult Field 1 | Wireless Bluetooth Speaker, Black