The right earbud dies immediately after being taken out of the case. It can produce sound while still in the case. I haven't fully tested the left one, but I feel like it's also deteriorating. It's best to purchase with the assumption that the batteries will need to be replaced. The case itself has no particular issues. Please check the photos for scratches and dirt. How about it for the case or for parts? This is a junk item, so no claims and no returns are accepted. Please comment if you have any questions. Other features... Junk, Noise Canceling