Ergonomic ergonomic designed to help get rid of fatigue after prolonged use of the wireless mouse. Non-slip, anti-sweat, delicate and comfortable, giving you a better experience. Accurate and sensitive optical motor, sensitive and precise optical positioning, ergonomics, circular arc shape corresponding to the palm. Adopts high-resolution optical positioning technology, greater accuracy and smoother mouse positioning. Four-speed switching, easy to deal with office, game, design and other application needs. Package Included: 1 * Wired Vertical Mouse