I have the yellow digital worktunes for 2-3 years now use them when mowing on a garden tractor. They do cut fatigue vs no ear protection & are mobile, sometimes forgetting to take them off.
5 years with a REI fender mount radio mounted on a Gator.
4 years with a roof mount REI connected to a noise reduction headset mounted in a skidloader, only problem is wires take a beating. The hyd screech is effectively muted with this setup.
7 yrs with a cheap wal-mart radio mounted in my cab utility tractor.
Quite an array there. So tell me, how was the AM reception on the REI's? I'm still waiting to find out about that.