Logitech Wireless Mouse M325 with Designed-for-Web Scrolling - Crimson Ribbons 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 receiver that can stay in your laptop Logitech Advanced Optical Tracking: Enjoy point-and-click precision