Title: not rugged enough for me
Product review: I used the 510 for about two weeks. The mic portion of the unit quit on me. We have a farm-feedlot operation. I didn't want to wear it on my ear all the time. I carry my bluetooth in my front shirt pocket between calls. I found it cumbersome to untwist and place on my right ear (it swivels around to fit either ear). It seems everytime I took it from my pocket it was configured for my left ear. On the plus side it had good volume and they could always hear me.
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