I bought the Terrano before it was sold to Terrano. I think the name was the Cardo BK-1. I used it for years until I crashed that helmet. My new helmet doesn't fit the device so I purchased the Aftershokz device. It works fine unless there is a headwind. With a headwind, I can still hear the person talking to me but they can't hear me at all. I wouldn't buy it again. I'm considering purchasing a new helmet that will fit the Cardo BK-1 I have that still works fine after five years.