I used to carry a sony radio and some sony stereo speakers (didn't need batteries) back around 2004. But they never could be heard more than about 10 feet away. I love golf, enjoy riding and walking, and enjoy some music if the vibe is right, but I shouldn't have to hear another group's music. My frustration with golf these days is that golf courses are now accepting 4:30-5 hour rounds. I remember as a kid getting told that if we didn't play in 4:04 or so, we would get warnings.