Insignia Wireless Optical Mouse Ns-pnm5003-sv Optical technology: LED lights scan the surface beneath the mouse to detect movement with a fair amount of accuracy, suitable for everyday computing and browsing. Up to 1600 dpi movement resolution ensures precise operation. 2.4GHz wireless connection: Enables you to find a comfortable position. Scrolling wheel: Helps simplify navigation. Battery status indicator: Lets you know when you need to replace batteries before they run out. Compatible with most Windows and Mac computers: Works across a wide array of computers.