Supply the tunes for you and your friends no matter where you go with the Sony ULT FIELD 1 Wireless Portable Speaker. This portable speaker provides impressive bass response thanks to its side passive radiators. Additionally, you can enhance the bass even more by simply pressing the ULT button. Regardless of the weather conditions, the ULT FIELD 1 is designed to deliver exceptional performance. It is compact, waterproof, dust-proof, shock-resistant, and rustproof. Not only can this versatile speaker stream your favourite music from your phone, but it also allows for hands-free calling. With its built-in mic featuring echo cancellation technology, you can enjoy clear voice pickup while making calls.