ERGONOMIC DESIGN - Places your hand in a natural "handshake" wrist & arm position for smoother movement and less muscle tension. Cute Rounded shape just fits in the palm of your hand. Once you get used to it, you will love it! ADJUSTABLE DPI - Switch between DPI levels 1000 / 1600 to adjust mouse responsiveness depending on your needs. And Blue LED tracking technology, enabling you to use the mouse on a wide range of surfaces.