... left, right, scroll, page up, page down, resolution option)Superior wireless optical sensor.Use for home or office use.Specification: 2 ... is up to six months.Intelligent connectivity, no need to code, plug and play.Ergonomically designed, comfort grip.Many dormant ... .800dpi/1200dpi, cursor speed adjustable.Power switch.Low-voltage alarm function.System requirement: Use with Windows 2000/XP/VISTA/ ...