So my CUDIS ring was one of the first DePIN projects that I participated in. I purchased the Black ring in a size 12. I worked in a warehouse environment for quite some time, and now work with a lot of heavy machinery and robotics. I wear work gloves most of the time but handle hard tool steel and various tools all day long. As you can see a lot of the black “colorant” has worn off, but the ring itself is still in great shape. It has not effected the operability of the ring at all. Ill be honest in staying that if I charge this thing once a week for 30 minutes that would pushing it… I think I went almost a month once? The battery lasts an extremely long time, and I do all of my daily things and it last a very long time. Of course my expensive smart watch feeds me all of the same data, but I look forward to what the future may hold for the project.