If you would like a more functional ultra-portable travel speaker: The Ultimate Ears Miniroll is more expensive and slightly larger than the JBL Go four, however it sounds a little bit fuller and it has a handy integral strap that helps you to strap it to the pole or https://www.bluetoothspeaker.top/usb-tf-aux-strong-bass-home-theater-subwoofer-party-stereo-wireless-bluetooth-speaker/