In any case, it quickly wears off and doesnt provide any aid in grip. I used them moderately for at least 4 days without recharging the case. The audio experience with this is brilliant, from gaming to voice chatting. Absolutely Perfect! This product has really saved me from some serious neck pain that I had been experiencing before. Very disappointed in this item was totally not expecting this when I ordered. So these are useless to me on calls and I redirect to the headset I am trying to replace. The reason they went back is that my toes were hurting within a few minutes. Again, not a reason to not pick these up but if you want real (active) noise cancellation you will have to stump up more than this. Let me talk about comfort and Ill wrap it up.