Step up from older 27MHz wireless technology to Microsoft 2.4 Hz Wireless and experience confident connection, even in crowded wireless environments such as airports or meeting rooms - plus a 30-foot range for more freedom. With 4-way scrolling, you can efficiently scroll side to side as well as up and down in worksheets, Web pages, and more. Just point and press the Magnifier button to enlarge and edit details.Use the snap-in receiver to turn off the mouse and save the battery - many users average more than six months of battery life! Microsoft's High Definition Laser Technology is two generations ahead of standard optical and laser mouse products. It's more responsive (1000dpi), more precise (6000 FPS, 85 MOPS, 0.18 Microns or smaller), and offers smoother tracking via the Microsoft Intelligent Tracking System.