First of all, thank you for commenting that I am a good seller. After all, I waited for you for more than 10 minutes on that trading day. I would like to say that there is nothing wrong with the product itself, but that wireless products are not suitable for you. All wireless products on the market only last about 30 minutes when fully charged, even the famous brand Dyson vacuum cleaner. You can try 180 degrees, which will take more than 30 minutes.