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

Elongated rectangular display shape matches, Black color of device and band matches, Slim profile and overall form factor are consistent, Silicone band material appears to match, No visible brand in frame, but design is consistent with Fitbit's product line for this type of device

Inspire 3 Health &-Fitness-Tracker with Stress Management, Workout Intensity, Sleep Tracking, 24/7 Heart Rate and more, Midnight Zen/Black One Size (S & L Bands Included)

amazon

Elongated rectangular display shape matches, Black color of device and band matches, Slim profile and overall form factor are consistent, Silicone band material appears to match, No visible brand in frame, but design is consistent with Fitbit's product line for this type of device

1.47" Fitness Tracker with Bluetooth Calls

Walmart - SISROW

Black color, Silicone band