In order to communicate wirelessly between a NorTronic and a PC it is necessary to purchase the appropriate USB Wireless Adapter. This is sold separately because each Adapter can handle up to eight NorTronic wrenches. There are two communication frequency versions of the NorTronic because different countries operate different licence free radio transmission bands. The two frequencies that we offer cover most areas of the world. Please click here to view the map we have provided as a guide to the appropriate frequency to buy however, it is the user’s responsibility to ensure that local laws are complied with.