JBL WIND 3S Bluetooth Bike Speaker with Handlebar Mount - Black

Built for a bicycle, which is the thing the old listing never said. It ships with a handlebar clamp, the controls are big enough to hit with a thumb while riding, and a digital display on the face shows the charge left so you are not guessing halfway up a hill.

IP67 means it survives rain and dust properly rather than nominally, and two EQ modes let you swap between something that carries in open air and something that sounds right sitting still. It comes off the mount and works as an ordinary pocket Bluetooth speaker, so it is not one-trick.