Have this mouse ordered as part of a Promo Code action and must say that it is perfectly acceptable for the price. She has three switchable DPI settings and pre- and Backward buttons. It is equipped with two AAA batteries, giving it a weight that approach comes almost to the other mice. The size is just about acceptable for my man's hand. The installation on insertion of the micro-USB adapter done quickly and easily. Let's see how long it lasts ...