Prentke Romich Company
http://www.prentrom.com/support/article/630

Can I Use an Earphone or Speaker with my SpringBoard Lite?

You can connect headphones or amplified speakers to the SpringBoard Lite. If you are using Auditory Prompts, you will probably want to also use Headphones. If you are giving a speech or making a report to a group of people, you might want to use amplified speakers.

Your headphone and/or speaker connectors must fit the Headphone/Speaker jack (3.5mm) on the right side of the SpringBoard lite case.

This shows the external speaker/earphone jack on the side of the SpringBoard Lite.

You can plug in headphones or speakers but not both at the same time.

If you are using speakers, go to the FEEDBACK MENU and turn the External Speaker option to ON.

Note: When the External Speaker tool is turned on, you will only hear output from the device if the External Speaker is plugged in.