Amazon.com: Fitbit Charge 6 Fitness Tracker with Google apps, Heart Rate on Exercise Equipment, 6-Months Premium Membership Included, GPS, Health Tools and More, Obsidian/Black, One Size (S & L Bands Included) :
Amazon.com: Fitbit Charge 3 Fitness Activity Tracker, Graphite/Black, one Size (no fitbit Warranty Support), 0.06 Pound : Sports & Outdoors