Oura has finally brought a new generation of its fitness tracker to market. The Oura Ring Generation 3 is available in four colours and will start shipping next month. The ring retails for US$299, but it also relies on a US$6.99 Oura Membership, which must be purchased separately.
https://www.notebookcheck.net/Oura-Ring-Generation-3-launched-in-four-colours-for-US-299.575332.0.html