You can use the Octave Headset to listen to stories on My Fabulous Storyteller, but you can also connect any headphones (or earplugs) equipped with compatible connections (3.5mm jack cable M/M).
The advantages of My Octave Headset? Thanks to its double jack plug (see photo below), you can connect a second cable to it (or even more if you have several Octave Headsets or other cables of the same type!) and listen to My Fabulous Storyteller in a group.