Logitech 910-004165 M325 Wireless Mouse Bubbly Connection Type: Wireless ; Movement Detection: Optical ; Movement Resolution: 1000 dpi 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