It's only about $20, even though Xiaomi products are not yet officially available here in North America. You can still find the Xiaomi Mi Band for sale through third-party resellers on places like eBay and Amazon. Or, if you happen to find yourself out in Hong Kong or other parts of Asia, you can pick one up for about the equivalent of $15. It's a lightweight fitness and sleep tracker, complete with a slick mobile app, interchangeable wrist bands, and a 30-day battery life.
Check out our unboxing video and feature overview of the Xiaomi Mi Band above for a closer look at this device. A fuller written review will follow very soon.
UPDATE: The review has now been published.