Well Time for an UPDATE - Just to bring everyone up to speed. I purchased from Yacht Designs back in December 2017 Two J1708 Engine Gateways YDES04 and Two Text Displays YDTD-20. I believe the price was about $700.00. I had Precision Marine in New Rochelle, NY install a NEMA 2000 Back bone and connect to the Yacht Devices products, also installed was a Ray Marine Tri Data - it took 2 Mechanics 6 hours to install, $1600. Unfortunately they left without it working and we agreed they would come back when the 41pc was Commissioned in 2108. Well she was Commissioned April 16 and after many trials and tribulations I finally can read my engine hours, engine temperature, Boost Pressure, RPMs, Battery Voltage, Alternator Voltage on the Text Displays. Needless to say when I update my Chartplotter / GPS the Text Displays will not be necessary and I should have only bought one Text display since it shows both engines on the one. Yacht Devices has unbelievable Customer support, unfortunately they are in Russia so we only communicated by e-mail but it was sometimes on a daily basis and a few times a day and he does have the capability to SKYPE. They have a US distributor in Chicago and they were also working with Peter Braffitt of Gemco in North Carolina and Peter was instrumental in getting me to purchase the Yacht Devices. I did include the Chicago US dealer in my many e-mails to Yacht Devices but they never responded. Well any questions just send then to me. Ironically allI wanted to do was find out my engine hours and since Volvo is proprietary with there diagnostic equipment and Precision does not go back to 2000 so I was stuck trying to find an alternative - I could not just get a Code reader like all my gas engine friends can - but finally i have what I set out to get and BOAT - Break Out Another Thousand is surely true in this case - LOL, but Due to the weather have only been out 13 times since April but did enjoy every ride. What can i say, just spending my kids inheritance.