Comfort Designed by ergonomic experts for comfort in either hand, with rubber grips featured on each side of the mouse. Snap-in Receiver Use the snap-in receiver to turn off the mouse and extend battery life.* 4 Buttons Use the Back button to easily navigate folders or Web pages, and press the scroll wheel for AutoScroll. Battery Status Indicator Red light indicates when your battery is running low. Magnifier Enhance your productivity with additional software features including Magnifier**, available to download at » www.microsoft.com/hardware High Definition Optical Technology More responsive, more precise, smoother tracking. Customisable Buttons Get quick access to the media, programs and files you use most often with customisable buttons. Ergonomic Design Point and click in comfort—ergonomic design helps you work longer without discomfort. High Definition Optical Technology Microsoft® High Definition Optical mouse products are more precise, more responsive and deliver smoother tracking. 6+ Months Battery Life Work with less interruption with longer battery life. Laptop/Notebook Mobile Compact and comfortable, our handy notebook and laptop products are designed for convenience and mobility. Snap-in Receiver Plug in the snap-in receiver when you’re ready to work, then snap it into your mouse when you travel, preserving battery life. Wireless Technology Give yourself room to move—wireless mouse products let you work without worrying about tangled wires. 3-Year Limited Warranty