Fitbit Charge 4 is here: Specs, features, release date - Android Authority
Mobile Monsters - Make every minute count with Fitbit Charge 3—a health & fitness tracker that packs built-in GPS and personalised heart rate features into a sleek, comfortable wristband. Going for K3,150.
Save $20 on Fitbit's Charge 4 with GPS tracking
Amazon.com: Fitbit Charge 4 Special Edition Fitness and Activity Tracker with Built-in GPS, Heart Rate, Sleep & Swim Tracking, Black/Granite Reflective, One Size (S &L Bands Included) : Sports & Outdoors