Genius Company introduced a new compact optical mouse Genius NetScroll 321B for laptop users and ordinary PCs. The ad hoc construction of the robot arm, provides a minimum burden on the brush to use it. Moreover, thanks to universal corps to work with the mouse can be left as well and right arm. Genius NetScroll 321B is equipped with an optical sensor with a resolution of 1200 dots per inch. Mouse itself is quite compact, which makes it extremely convenient during transport. On the Russian market novelty appears in the September 2008. Estimated cost model is 300 rubles.