Hi, I'm Pete. Welcome to JustAnswer! I'm reviewing your question now, and will post back with your reply ASAP.
There are different types of JamMan stereo - can you please confirm the model number, or attach a photo?
You may find the model number on the packaging or on the user manual.
I haven't heard back from you yet - please reply and let me know if you still need assistance with this.
Ok, have a good day!