Compatible with Mac OS X? Linux and all versions of Windows.

Built-in 500mA rechargeable battery? auto-sleep feature conserves power and extends battery life.

800 / 1200 / 1600 DPI Resolution Optical Tracking Technology provides more sensitivity than standard optical mice for smooth and precise tracking on a wide range of surfaces.

Added next/previous buttons provide convenience when webpage browsing; the best choice for internet surfers? gamers and people who work at length at the computer.

Package includes: 1 wireless vertical ergonomic optical mouse (built-in lithium battery included)? 1 2.4G USB receiver? 1 USB cable and 1 instruction manual