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. Sony provides a detachable multi-way carry strap to make it easier to carry it on the move, or hang it up when you reach your destination. Purchase a second ULT FIELD 1 and you can pair them both using Bluetooth for detailed stereo sound. With a compatible Android smartphone, you can use Bluetooth Fast Pair to pair it to the ULT FIELD 1 with a tap. Use the Sony Music Center mobile app to optimize audio