Logitech M317 Notebook Mouse Unifying Receiver: Robust wireless connection with one tiny USB receiver that stays in your laptop Logitech Advanced Optical Tracking: Enjoy point-and-click precision and smooth scrolling Long battery life: Up to 12 months of battery life virtually eliminates the need to change batteries Wide compatibility: Works with Windows, Mac and Linux computers Contoured design: Comfortable shape with soft side grips; Logitech 910-002990