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), Special Edition - Walmart.com
Fitbit Charge 4 review: A better fitness tracker without the bulk - CNET
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) (Renewed) : Sports & Outdoors
Fitbit Charge 4 Special Edition Activity Tracker GPS + Heart Rate Granite Reflective FB417BKGY - Best Buy
Fitbit Charge 4 review: No contest - Android Authority
Fitbit Charge 4 vs Special Edition - What is the difference?