I tried to put a picture but it’s getting deleted as the site believes it’s promotion. Diabetes patch is something being sold as a Chinese herb which needs to be stuck on your naval. It’s the exact same thing mentioned in the thread below though I did not get much information over there .
It's used to keep an eye on your blood sugars. At the top of this page is a search bar, it should give lots of results for Libre sensor. Or check out their website.
If that diabetes patch you talk about is anything other than snake oil to make some nasty persons rich over the back of scared diabetics I'll eat my Libre sensor.