So my son ends up turning the volume up very loud in his one ear. I downloaded the DLC but couldn’t get it to install. Finally a size 6 that is actually a size 6 - have tried so many different brands to find an accurate fit - these are both an excellent fit and very comfortable. I cut them off. Only got them today and they are so soft and comfortable. My husband bought these for me because I am a runner and I hate the ear buds. The wax cup cleaner is a bit large for my cups on the Oticon Minirite 2 ear pieces but I just adjusted one down a bit and it works fine. and-repeated efforts/attempts. Not even close to as great sounding as my Aiwa Arc 1 blue tooth Headphones or my Sennheiser Noise Canceling blue tooth headphones, but the battery life of the TREBLAB E3 is at least double that of the AIWA and Sennheiser products. Really nice collection!