Google has unveiled its new Fitbit Air, a screenless wearable that retails at $100. The device includes health and fitness tracking features such as 24/7 heart rate monitoring, heart rhythm monitoring with AFib (atrial fibrillation) alerts, blood oxygen level, resting heart rate, heart rate variability, sleep stages and duration, and more. Google claims the device is designed to allow users to live in the moment and is smaller than its predecessors, 25% smaller than the Fitbit Luxe and 50% larger than the Inspire 3. It can be tracked through the Google Health app and is available for pre-order now.