Shadow cadeve 3-Button Water-Proof USB Symmetrical Optical High Precision Wired Mouse Compatible with Mac and PC (B003W), Black Quick and precise navigation: Scroll wheel and Microsoft optical technology let you move quickly and accurately through documents 1000 dpi: High-performance 1000 dpi optical sensor delivers greater accuracy and control Easy to set up and use: No software to install, no feature setup required Comfort for right or left hand: Get a grip with a comfortable design created for either hand Smooth, precise and affordable usb-connected 3-button optical mouse