[M] CHERRY MW 4500 Ergonomic Wireless Mouse Review
 

Since the MW 4500 does come with a rather unusual shape, the user needs a bit of time to get used to it, when coming from a regular office mouse. The wireless feature is an added bonus, while the dongle is really small in order to be used with both laptops and desktops, without obstructing devices connected to nearby ports. For some extra flexibility, we do have three DPI steps to choose from: 600 / 900 / 1200 but considering the maximum DPI value we would not recommend it as a gaming product.

http://www.madshrimps.be/articles/article/1001075/