If you need a more functional ultra-portable travel speaker: The Ultimate Ears Miniroll is a lot more expensive and a little larger than the JBL Go 4, but it really sounds a little bit fuller and it has a handy integral strap that allows you to strap it into https://www.bluetoothspeaker.top/usb-rechargeable-fast-charger-sound-wireless-speaker-with-led-256-rgb/