This is by far the best-functioning earpiece I've used. The sound is clear, and it is compatible with every phone I've tried. The mute feature is great for the phone I have now, which for some unfathomable reason does not have a mute function built in (!!!). Back to the headset...It's great, but it wears out quickly. The wire between the microphone and the earbud frayed and wore out quickly, so now, people can hear me talking, but I don't hear them. A little disappointing considering you pay a premium for this product. However, I don't have a better earpiece to recommend. If you do buy, just expect to buy again soon.