 Monday news on WTOP, 10 and 40 past the hour. Here's Tracy Jahnke. This is a Bloomberg Money Minute. Rings for centuries have been symbols of wealth, status and commitment. The ring as a health tracker is a 21st century development. We've reached 2.5 million rings sold. Tom Hale is the CEO of Aura Health and he tells Bloomberg the market for his company's smart rings is large, both currently and potentially.