Take music anywhere with the Sony ULT FIELD 1 Wireless Portable Speaker. ULT POWER SOUND boosts bass and delivers high-volume playback, while water-, dust-, rust-, and shock-resistant construction (IP67 and MIL-STD-810H) keeps it durable. The adjustable two-way strap, accessible playback controls, and hands-free calling make it easy to use on the go. Enjoy up to 12 hours of playback (volume level 25 with ULT POWER SOUND on; actual performance may vary) and fast USB-C charging. Pair two FIELD 1 speakers for wide stereo sound (second speaker sold separately) and control music with the Sony Music Center app. Box includes speaker, USB-A to USB-C charging cable, and attached strap.