Fitbit B0B5F9SZW7 Fitness Tracker
- Fitness Tracker
- Black/Midnight Zen
- More reviewed than 98%
A Fitbit tracker in a black and Midnight Zen colorway; confirm the specific model and feature set on the listing before buying.
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How it ranks among the 44 fitness trackers we track
4.2★ across 24,802 Amazon ratings, Bayesian-smoothed toward the category average.
24,802 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
10,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 44 fitness trackers we track - how the scorecard works · full fitness trackers data report. Confidence: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
This is a Fitbit-branded fitness tracker in a black case with a Midnight Zen band. Beyond the brand and color, the listing does not provide screen size, sensor list or battery life, so shoppers should confirm those details on the product page before buying.
The listing identifies this only by its Amazon catalog number rather than a named Fitbit model such as Charge or Inspire, and the color is given as Black/Midnight Zen. Fitbit trackers in this price and rating range typically track steps, heart rate and sleep, but none of those functions are confirmed in the data provided here.
- Fitbit brand
- Black case with Midnight Zen band
- Rated 4.2 stars
- About 10,000 bought in the past month
Who it's for
Buyers already set on the Fitbit ecosystem for step and sleep tracking who are comfortable confirming the exact model and features before checkout. Not a fit for anyone who needs a documented feature list up front.
Strengths and trade-offs
Drawn from this product's published specifications.
- Fitbit brand with an established companion app
- High recent purchase volume suggests easy availability
- No sensor, battery or display specs listed
- Model identified only by catalog number, not a named Fitbit line
Performance notes
With a review count near 24,800 and roughly 10,000 units reportedly bought in the past month, this tracker sees substantial ongoing demand, though the underlying spec sheet in this listing is limited to color.
Specifications
| Brand | Fitbit |
|---|---|
| Model | B0B5F9SZW7 |
| Color | Black/Midnight Zen |
Other Fitbit fitness trackers
How it compares
This product against the closest alternatives we track in fitness trackers.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Fitbit B0B5F9SZW7 Fitness TrackerThis product | 4.2 / 5 | 24,802 | 4.3 / 5 |
| XIAOMI BHR07PYGL Fitness TrackerXIAOMI | 4.5 / 5 | 10,520 | 4.4 / 5 |
| Garmin 010-02809-00 Fitness TrackerGarmin | 4.7 / 5 | 1,974 | 4.4 / 5 |
| SAMSUNG SM-R390 Fitness TrackerSamsung | 4.4 / 5 | 5,770 | 4.3 / 5 |
| WHOOP 973-002-000 Fitness TrackerWHOOP | 4.3 / 5 | 3,754 | 4.3 / 5 |
Similar fitness trackers from other brands
Questions about the Fitbit B0B5F9SZW7
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What color options does this Fitbit tracker come in?
The listing specifies a black case with a Midnight Zen band.
Which Fitbit model is this?
The listing identifies it only by Amazon catalog number B0B5F9SZW7, not a named Fitbit product line.
Is battery life listed for this tracker?
No, battery life is not included in the available specs.