Specifications:4 gears adjustable DPI makes it more sensitive and provides quick response.Low noise operation causes no disturbance for your family.Ergonomic design can effectively relief the fatigue.It is plug and play and no external driver is required, which is convenient to use.Item Name: Wired MouseMaterial: PlasticOptical Resolution: 800/1000/1200/1600DPI (Adjustable)Number of Keys: 4Interface: USBButton Service Life: More than 3 Million TimesFeatures: Wired, Plug and Play, Computer AccessorySize: 11cm x 6cm x 2cm/4.33" x 2.36" x 0.79" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Wired Mouse