A:AnswerYes. It has three modes. Fast, Slow and no rotation. I have not had too many problem with tangling unless I snagged it in a wrong position. Brush untangled and released the hair easily as soon as I stopped the rotation. Love the brush, style with one hand !
A:AnswerThe brushes are removable so you should be able to change sizes. I know I can. If not, then there may be a malfunction and you should contact customer services.