Genius(Ergo 8250S) Wireless Vertical Ergonomic Silent Mouse - 1600DPI - 2.4GHz -Silver Grey

Genius(Ergo 8250S) Wireless Vertical Ergonomic Silent Mouse - 1600DPI - 2.4GHz -Silver Grey Silent click RF frequency: 2.4 GHz Sensor: Optical Resolution (DPI): 1600 Number of buttons: 6 (right, left, middle (under the wheel). forward, backward and the DPI switch button (resolution)) Battery type:AA Weight: 93 g Range: 10m Dimensions: 78.3 x 111.2 x 73.8mm Color: Black-Silver