Used oura ring, still works great but battery only lasts 2-3 days. Charges quickly, easy to remember to charge when you shower. Has expected scratching from wear and tear but honestly isn’t super noticeable. Great chance to try out the tech at a low price before committing to a new ring. This is an oura size 10. I recommend using a sizing kit to confirm this will work for you - please don’t ask me about sizing. I am just upgrading to a new color and turns out I need a different size.