Gymboss Interval Timer and Stopwatch Black Blue
- 3 settings
- AAA battery
- 2.25 inch screen
- 35 g weight
- ABS plastic, black and blue
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A very light ABS stopwatch that takes a common AAA battery. The listing does not describe the three settings or any clip.
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ASIN: B00CO8HO6OCategory: Stopwatches
Overview
Gymboss makes this small stopwatch from ABS plastic in black and blue, powered by an AAA battery. The listing gives three settings and says it is not smart home compatible.
The common battery and light body make it simple to run and carry. The listing does not describe the settings, alarms or how to wear it.
Who it's for
Interval workouts and circuit training suit a light timer with a common battery. Anyone who wants data features or a wearable mount should look at a different timer.
Pros and cons
- Common AAA battery
- ABS plastic shell
- Readable screen size
- Settings not described
- Clip or strap not listed
- Not smart home compatible
- No data features listed
Performance notes
A common cell is easy to replace in the field. ABS plastic resists knocks better than thin shells. Keep the case dry, as water ingress is not addressed in the listing.
Specifications
| Brand | Gymboss |
|---|---|
| Dimensions & fit | |
| Item Dimensions D X W X H | 0.55 in D x 2.25 in W x 1.75 in H |
| Screen size | 2.25 inches |
| Item weight | 35 grams |
| Power & efficiency | |
| Battery Type | AAA |
| Construction & materials | |
| Material Type | Plastic Acrylonitrile Butadiene Styrene |
| Color | Black / Blue |
| Compatibility & installation | |
| Smart Home Compatibility | Not Smart Home Compatible |
| Included components | |
| Unit Count | 1.0 Count |
| Other details | |
| Number Of Settings | 3 |
Closest rivals on specs
FCXJTU YS-802C Simple Silent Stopwatch- Item Weight 0.08 vs 0.09 pounds (-11%)
- Screen Size 2.2 vs 2.5 inches (-12%)
Marathon Adanac 8000 Digital Stopwatch- Item Weight 0.08 vs 0.13 pounds (-38%)
- Screen Size 2.2 vs 2.6 inches (-15%)
Marathon Adanac 3000 Digital Stopwatch- Item Weight 0.08 vs 0.15 pounds (-47%)
Frequently asked questions
How do I replace the battery in the Gymboss BLACKBU?
The listing names an AAA battery and gives no steps. Check the product manual.
Is the Gymboss BLACKBU smart home compatible?
No. The listing says not smart home compatible.
How big is the screen on the Gymboss BLACKBU?
The listing gives 2.25 inches.
What is the Gymboss BLACKBU made of?
The listing gives plastic acrylonitrile butadiene styrene.