The microphone may work alright, but no matter how I tried, the earpiece refused to stay in place. This came with neither the triple-flange nor the foam earpieces I would have expected from Shure. None of the 6 rubber earpieces that came with the Shure would stay in place, and the over-the-ear hook was extremely flimsy - its only apparent purpose being to hang the device from your ear so it wouldn't fall onto the seat. When I held the earpiece in place, the sound was tinny and volume very weak.I returned it and bought the ETY*COM mobile phone headset instead, which performs very well - the way this one should have.