One thing disturbing is that the amount does not light up and down during fasting. So if I have a phone, it will gradually increase the pain of the volume, and then the pain slowly Car Stereo increases, volume, when you call. I prefer the old method, where a pool of stupidity is what I do and I try to avoid too high too fast. I think this may be a mute button for the occasion, but I can not see, and when I read the work o