Google has unveiled its latest innovation in the wearable technology space, the Fitbit Air. The device is Google's first new fitness tracker in four years and comes with a price tag of $99. It is available for preorder now and will go on sale May 26. The wearable offers health and fitness tracking features like 24/7 heart rate monitoring, A-fib (atrial fibrillation) alerts, blood oxygen level, resting heart rate, sleep stages and duration, and more.