Purple Butterfly Wind Chime with Color Changing Solar Powered LED

I purchased this item as a birthday gift for my Mom because she asked for wind chimes and her favorite color was purple and I thought the concept of having a solar panel to light it up was really neat. She informed me that it was beautiful and that she really loves it (I have not seen it in person, these are her words); however, she was browsing the "instructions" that came in the box and that the bottom it states Warning : for indoor use only. Not sure how a solar panel wind chime is suppose to work indoors? The "for in-door use only" was not published on the item description on Amazon or else I probably would not have gotten it. Luckily she has a covered porched that she said she will keep it on and will bring it in if it rains or snows. Hopefully it won't rust or anything if she keeps it out.