This Interface MK3-USB (VE.Bus to USB) connects Victron's VE Bus port to a USB connection that you can plug in to your PC. Every MultiPlus and Quattro is ready to communicate with a computer through its RS-485 data port. All you need to link to your PC and be able to set and read out all parameters is the data link as shown plus an ethernet cable or Victron UTP cable (not included). Moreover, all Victron Energy products equipped with an RS-485 data port can easily be integrated in a computerized monitoring and control system, such as VE.Net from Victron Energy. VE-Configure software is required. Software can be downloaded for free from the Victron website. Software can be run in demo mode without having this or any external device present. For most purposes the Mk3 version will be no different than the previous Mk2 version, it was just redesigned to allow it to communicate with a wider range of devices.