The new remotes for the clarion come in two dash/transom mounting hole sizes.
One is a 2 inch hole and is the CMRC2-SB, it does not have a LCD display. I am using this one on my transom.
The other is a 3 inch hole and is the CMRC1-SB
and it does have the LCD display. It is great for the dash.
Only the XMD3 and newer models will adapt to these. So if you are trying to use the old remote on a new unit forget it. Good news is Clarion figured that out and have made the newer units backward compatible from the XMD3 series forward. Also, These come in two options, with or without a stainless trim ring. I have posted the ones without that- but it does make it bling with the stainless trim.