Fitbit's Charge 3 Offers a New Take on an Old Tracker | WIRED
Fitbit Charge 4 (and Charge 3) tips and features: How to use your new tracker
Fitbit Launches the Charge 3 - Outside Online
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