Supply the tunes for you and your friends no matter where you go with the ULT Field 1 wireless portable speaker from Sony. This off-white-colored speaker offers side passive radiators for significant bass response, but you can press the ULT button to boost it even further. No matter the weather, the ULT Field 1 is ready to perform. The compact design is waterproof, dustproof, shock-resistant, and even rustproof. The versatile speaker can not only stream your favorite music from your phone, but it can make hands-free calls. A built-in mic features echo cancellation for clear voice pickup.