NetScroll+ Traveler: The Genius "NetScroll+ Traveler" breaks the conventional optical mouse - with buttons integrated into a seamless enclosure; you can't see them, but they just work fine. This optical mouse offers three additional colors: Ruby, Blue, Silver and Dark black. All these 400dpi mice with translucent magic roller and lower case make a great eye-catching design. So when the optical light of the NetScroll+ Traveler shines; it can look like a beating heart, as if it can reflect your "heart" and let your ideas shine brightly.