There have been frequent failures of this mouse of the DOA kind. Many DOA mice do not communicate with their dongle and the Logitech reset procedure does not help. It isn't clear whether this problem is a design or a production problem.There have even been many DOAs of the same kind with so-called refurb MX Revolutions recently sold by WOOT.For details check either Logitech's customer blog or WOOT's.Note also that Logitech's reset procedure involves six button actions and a switch flip, since there is no reset button on this mouse to reconnect the wireless, a seemingly clear design defect.This is a huge black eye for Logitech, heretofore a company held in high respect.