If you think Plantronics has to offer only Bluetooth headsets, well, you are wrong. The manufacturer has quite a flourishing line of products with office items as well. These products incorporate its Calisto Pro series from a few years ago, and the newer Savi Office system, which functions with both VoIP and land-line systems. The company has lately introduced an enhanced version of the Savi headset dubbed the Savi 440, or W440-M. It has basically the identical features as before, but in ...