At less than 13 mm (0.5 inches), the Z4000 is designed as the perfect companion to your thin and light PC.- Your PC is thin and so should your accessories. This mouse is the perfect balance of portability and comfort.- No software to install - just plug in and go. The familiar mouse experience is a key product feature, as you may not want to learn touch scrolling or gestures.- Design is critical and the Z4000 compliments the key trends across PCs. With a silver base and polished black top cover - it’s the black dress of mice (it goes well with everything).