From 9to5 Toy's section.
Kensington’s highly-rated Slimblade Trackball USB 2.0 for PC and Mac is a recommended choice for anyone using a computer extensively trying to avoid contracting RSI symptoms, or, indeed, anyone who already has them..
the good news here is the product is available at 49 percent of normal price via Amazon now. It’ll cost you just $75.99, a saving of $74 and the cheapest we could find at the European desk (where we use one of these ourselves, along with a
