​@jackgray138 Yes, the C500 does support a stethoscope plug-in! It is compatible with the Ri-sonic PCP-USB plug-in stethoscope as well as the ThinkLabs One stethoscope, which connects via a 3.5 mm jack.

For detailed information on how to use these stethoscopes with the C500, please refer to pages 42 and 43 of the C500 Configuration and User Guide available in our Product Documentation Portal. 

If you're interested in ordering one, and would like guidance on choosing between the two, we can connect you with our Account Team who can assist you further!