Logitech MX600 Laser Cordless USB-PS/2 Mouse (Silver/Black) Logitech MX600 Laser Cordless Mouse General Features: Silver / Black color scheme Comfortable, ergonomic shape 2.4 GHz digital cordless technology State-of-the-art laser technology for unmatched precision and control Works flawlessly on surfaces where optical mice cant go..EVEN ON GLASS! The ultra-compact receiver plugs directly into a USB port; eliminating clutter (includes a USB to PS