Oura Ring Size 8 Silver Heritage - Generation 3 I am the original owner and only person that has used this ring. It's in good used condition. There are some light scratches throughout. I decided to get a different color and don't need two. I've been wearing both for a week and data is exactly the same coming from both the rings. Battery life is about 4 days, or about 5 days if using airplane mode at night (doesn't affect tracking). Includes ring, charging base and cable. Original box.