I think @K0TX will comment, but unless you bought your Digirig over a year ago, your version is 1.9. In that case, the instructions and explanations for the conversion from logic to CI-V is explained in Digirig Mobile Rev 1.9 – digirig
Yes, Digirig’s on Amazon are in default (logic levels) configuration and yes, you’ll need it in RS-232 for serial CAT control of Elecraft KX. You can use it without modifications for audio and PTT now.