conditional formatting formula for if a cell contains some letters as part of its entry

[TAKLAM]

Hello.
I want to format rows in a SS according to whether a cell in column "I" (and ONLY the cell in column "I") contains "CC" or not.
Column "I" either has entries that are along the lines of "CC10101" or "10101"- so either just a number or a number preceded by CC.
So I only want the row to be conditionally formatted if the cell in column "I" of that row contains CC as part of its entry.
I have tried:
=ISNUMBER(SEARCH("CC",$I2)>1
=ISNUMBER(SEARCH("CC",","&$I2&","))
and some others in a similar vein but they seem to sporadically change the formatting often even if the "I" cell does not contain a "CC" so I am clearly getting it wrong.
Any help would be much appreciated please.

 

[Snakehips]

@TAKLAM Welcome.

Does this help?

Testing Formula Update.xlsm
	G	H	I	J
2			12345	CC876
3			CC1234
4			CC999
5	CC1234		12234
6			CC101010
7
Sheet3

Cells with Conditional Formatting
Cell	Condition		Cell Format	Stop If True
2:8	Expression	=LEFT($I2,2)="CC"	text	NO

 

[TAKLAM]

Amazing thank you so much