Fitbit Unveils New Versions of Its Charge & Flex Trackers

Fitbit's two best-selling wearables are getting an upgrade, the company announced today, in the form of brand new trackers -- aptly dubbed the Charge 2 and Flex 2. While the brand new Charge 2 adds a larger screen to the original and brings over the likes of the Charge HR's heart rate tracking, the slim Flex 2 boasts water-resistance up to 50 meters -- thus making good on a promise that the Jawbone UP3 made and failed to keep -- while LED lights readily display alerts and daily progress. Both de...