This is the lowest beat in YY's MP series YY. If YY beat is less than 1000, there is no cost performance. No vibration is nothing more than the sponge residue in the racket frame caused by thermal foaming, which makes people say that the ball is used for shock absorption. The racket frame is used for shock absorption, and Yonex uses a hair. This makes the brand level really low. I don't care, the price is about two yuan.