Oura Ring 5 is here, 40% smaller — closer to the size of a wedding band — and has some brand new health features. Mark Gurman explores how the Oura Ring has evolved, generation by generation -------- More on Bloomberg Television and Markets Like this video? Subscribe and turn on notifications so you don't miss any videos from Bloomberg Markets & Finance: https://tinyurl.com/ysu5b8a9 Visit http://www.bloomberg.com for business news & analysis, up-to-the-minute market data, features, profiles and