***PLEASE READ DESCRIPTION!!*** I cannot guarantee this ring will function as it should. Elegant Oura Ring 4 with a modern silver look. Ideal for health tracking. I replaced this ring because there had been days that I check the app and no data was collected. It works for a few days, then a day here and there is doesn’t collect data. I stopped wearing this ring about 6 weeks ago. I wore this ring for about 11 months when it started spontaneously not collect data. Once I charged the ring it would work for a few days. I don’t know what the exact issue is. When I contacted customer service, I explained my issue and they sent me a new one. The ring does have wear on it, but still looks good. So please take this into consideration when purchasing.