Logitech is an international market leader in human interface devices and software that link people to digital information and the Internet and enable them to work, play, learn and communicate more effectively in the digital world. The company's products combine essential core technologies, continuing innovation, award-winning industrial design and excellent price performance.PRODUCT FEATURES:Multimedia keys;Optical;Spill resistant design;USB;XP native hot keys;Tilt wheel plus zoom;Design, comfort, and durability.