Science & engineering energy photovoltaic solar cell 8365 (seller in USA)

Description

I found these at an estate sale. I do not know much about them, technically.
I do have more than one, but EBay gives incentive to list one at a time. Send a question if you want more than one.
Please see photos.
I sometimes travel for work (where I sometimes find my treasures), so that is why I selected that it might take me 3 days to ship. If I am at home, I will ship ASAP.
Ships from Milwaukee, WI.
Thank you for considering the purchase! Your purchase really helps my family!
PLEASE! If there are issues, contact me and give me a chance to make it right before you leave bad feedback.