I have owned three Cardo / SCALA 500 headsets over many years. Simply the most comfortable and easy to use headset out there. I'm getting up in years and it has very good volume. couple that with it's comparatively low price and you understand why I love it. Now for the hate part. Unfortunatly, when I bought my last one over 4 years ago, I had to return it becaase it wouldn't pair with my phone. Upon receiving the replacment, it took some time but finally got it to pair and it worked flawlessly for years. Eventually it wouldn't hold a charge and I decided to purchase a new one through a vendor at Amazon. The first one I received would not charge. It would pair as long as I had it powered by the charger, but the minute I disconnected it it stopped working. I returned it and the shipper was quick to send his appologies and immediatly credited my account. But I was out the return shipping charges. Bought a second one from another vendor through Amazon and I'll be darned if it didn't work right. It paired by could not receive the phone's transmissions. So, at this point I sent the unit back to Cardo for "evaluation" and that was a little over a week ago. Great product... when it works.Bob T.Puyallup, WA