I hardly ever write reviews but this product is exceptional. The price is very affordable for the quality. I do not know if these were defective. The end result is that anything tapping the ear piece makes for annoying vibration sounds, and this also holds true for the excessively long cable. We bought these shoes for our 1-year-old, who just started to walked, at the recommendation from a family member. Not that I have the money to throw away but riding is about simplifing things and reducing stress. So I?m giving these a two stars because I love them, but they?re cheap. I make sure the camera is not in driving mode and auto shutoff is disabled. Everything else is great except that. I went to Best Buy and they had me running in 20 minutes.