This was inside the bill of a baseball cap with the word “MARINES” on the front. I tried changing the batteries, but it doesn’t seem to be doing anything. Does anyone know what this is?

It has a button on one side. But new batteries didn’t reveal it’s purpose. I’m thinking it’s too corroded now to work. I know that round thing is a simple speaker or buzzer, but I don’t know (a) what sound it’s intended to make and (b) why it was sewn into the bill of a baseball cap.

Internals, image 1:

Internals, image 2:

External, backside:

Cap pictures:

Edit: added images of the internals.

Edit 2: added a small description of the button, and why I didn’t just test it with new batteries (I did, but it doesn’t work). So, basically, all I know.

Edit 3: added a picture of the backside of the casing.

Edit 4: Adding pictures of the cap itself.

Thank you, everyone, for all of your input. If I’m ever able to get this thing working, I’ll add a video of the device and it’s audio.

  • @[email protected]English
    3•1 year ago

    Can you post what’s on the label of the cap? I think that will help tell us who made the item. I couldn’t find anything searching the number on the board with the company name on the plastic.

    Since it says Marines, I’m thinking this is some novelty item that might play Sousa’s Semper Fidelis.

    • 𝕸𝖔𝖘𝖘OPEnglish
      2•1 year ago

      There is no label on the cap. The adjustment strap, though, is plastic and says “MADE IN USA”.