When there's a lot of background noise it stays sound justice. But otherwise they're going super well. I bought 3 for 3 different people and we're happy. They are identical, the cable is the universal that mobile phones come out with now so it's great because I can use the normal charger and the pump as it carries battery the case where you store it I hope they last long and don't spoil the case because there's no way to load the helmets.
