plugs into my ex-works MSA Sordin ear defenders* and talks to my phone via Bluetooth. Makes and receives phone calls very well too as I found out by accident.
Usually, audiobooks downloaded for free from my local library. Or Radio 4, Radio 4 Extra 'live' or from the BBC Sounds archive. Sometimes podcasts. Never music.
Used when mowing, raking, strimming, hedge trimming, leaf blowing/sucking, path sweeping etc on my own in my own garden. All boring, repetitive and fairly mindless tasks but better exercise than paying for even more boring and mindless gym activities.
Only other time I would have anything playing through the ear defenders would be using an orbital sander for an equally mind-numbingly boring task. I don't have anything playing when using saws, grinders, drills or anything else that bites back
I'm not at all sure what my stance would be if this were a work situation. Fortunately:
None of that equipment would be intrinsically safe and suitable for use on-site.
I'm retired so it is now a SEP.
So I have no idea how long I have had them!
Edit: Sadly the television can receive Bluetooth but not transmit so I can't wear them whilst watching television.