fitbit on Twitter: "Smart Wake activates a gentle buzz on your wrist during your lightest sleep stage so you can really take flight when it's time to rise. Goodbye, groggy. Hello, energy. #
Amazon.com: Fitbit Charge 3 SE Fitness Activity Tracker Graphite/White Silicone, One Size (S and L Bands Included),1 Count (Pack of 1) : Sports & Outdoors
Fitbit Will Now Wake You When You've Had Your Ideal Rested Sleep
Fitbit Charge 3 Review: best tracker for features and price - Tech Advisor