These ULT Field 1 Bluetooth wireless speakers from Sony feature low-end frequencies that support exceptional booming bass, ULT Power Sound button to enhance bass, a sound diffusion processor that expands sound in any space with DSP technology, up to 12 hours of battery life and a multi-way strap that makes it easy to take anywhere. It’s water, dust and shock-proof, has echo-canceling technology and a built-in microphone.