This cable is used for connecting a microphone or a GM sensor top a digital input on a Vernier datalogger. The modular plug in one end of the cable fits mocrophone 248600 and the GM sensor 513575. The other end plugs into e.g. a LabQuest 2.
With two microphones, the speed of sound can be measured - they can simply be defined in the software as "photogates". Choose to display data in a table.
With a GM sensor, you are ready to measure radioactivity. This sensor can be selected as it is in software.