Thanks for your help. I have a 798CI SI COMBO and a 788CI COMBO, neither have the Ethernet capabilities. Wish I had thought about this when I bought them. I need a unit the same physical size to fit the hole in my dash that is Ethernet ready and at this point I think all I want it for is to share waypoints, have maps, speed, temp, depth and be a color unit. I won't need side scan or down image since I have the 1198 at the console as well. I can't see a use of the side scan on the TM, can you? Best bet is to sell/trade the 798 for one that I can connect. Any suggestions? Thanks again...