Provides an extensible design that enables service prioritization for data Design that delivers high availability, scalability, and for maximum flexibility and price/performance Logitech Advanced Optical Tracking Micro-precise scrolling: New designed-for-web scrolling makes searches, shopping and browsing easier Micro-precise scrolling: New designed-for-Web scrolling makes searches, shopping and browsing easier Feel-good design: Contoured shape and textured rubber grips keep your hand comfortable even after long hours Long battery life: Up to 18 months of battery life virtually eliminates the need to change batteries. Battery life may vary based on user and computing conditions. For Windows, Mac and Linux: Reliable wireless connection with tiny Logitech Unifying Nano-receiver that can stay in your laptop