HP 250 Dual wireless Bluetooth MousePerformance and Power, Get the performance you need to work on any task and virtually any surface. One AA battery can last up to 12 months, while a 1600 DPI optical sensor delivers smooth, precise control. And with multi surface sensor technology, you can track on multiple surfaces. Contains Recycled Materials,Contains 50% post consumer recycled plastic and 100% recyclable packaging. Designed for Comfort with the Environment in MindHeres a full size