Perixx PERIMICE-513 Ergonomic Mouse, Wired, Vertical Ergonomic Design, 1000/1600 DPI, Right-Handed, Reduces Fatigue from Prolonged Use Manufacturer: Perixx Computer GmbH - Designed in Germany Plug & Play, no driver required. You can use it immediately by connecting it to your computer. Equipped with a 2-stage resolution switching button (1000/1600 dpi) and 6 buttons including browser forward/back buttons. Advantages of a wired mouse: (1) No battery required (2) Stable signal and high responsiveness: Recommended for those seeking stable operability. Rubber surface processing - Comfortable fit and prevents slippage of the grip during use. *Only opened* 86