Mechanical Stop Watch Sports Chronograph Running Timer Handheld Stopwatch
- Stopwatch
- Sxj505
- 6.7 ounces
A basic mechanical, spring-driven stopwatch for simple sports timing. Its 3.9 average rating is on the lower side, worth weighing against the no-battery appeal.
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How it ranks among the 48 stopwatches we track
3.9★ across 107 Amazon ratings, Bayesian-smoothed toward the category average.
107 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Modest tracked demand 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 48 stopwatches we track - how the scorecard works · full stopwatches 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 handheld mechanical stopwatch, model SXJ505, weighing 190 grams and built for timing runs and other sports without a battery.
A mechanical stopwatch is wound and driven by its internal spring rather than a battery, which some users prefer for reliability in cold weather or simply for the tactile feel of a wind-up mechanism over a digital chronograph. The listing brand field reads simply Mechanical rather than a distinct company name. This listing carries an average rating of 3.9 from 107 reviews, though no review text is attached here to explain that feedback in detail.
- 190 g weight
- Mechanical, spring-driven
- Model SXJ505
- Handheld design
Who it's for
Fits coaches, runners or referees who want a no-battery, wind-up stopwatch for basic timing. Not the choice for anyone who needs split times, memory storage or digital precision timing.
Strengths and trade-offs
Drawn from this product's published specifications.
- No battery required
- Simple handheld operation for basic timing
- Average rating of 3.9 is on the lower end
- No split timing or memory features
- Less precise than digital chronographs
Performance notes
As a mechanical unit, timing accuracy depends on the spring mechanism rather than a quartz crystal, so it will not match the precision of a digital stopwatch over repeated use. It weighs 190 grams, light enough to hold or clip on for a training session.
Specifications
| Brand | Mechanical |
|---|---|
| Color | Sxj505 |
| Item Weight | 6.7 ounces |
How it compares
This product against the closest alternatives we track in stopwatches.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Mechanical Stop Watch Sports Chronograph Running Timer Handheld StopwatchThis product | 3.9 / 5 | 107 | 3.2 / 5 |
| Gymboss BLACKBU StopwatchGymboss | 4.5 / 5 | 5,500 | 4.3 / 5 |
| ACCUSPLIT 12440191 StopwatchACCUSPLIT | 4.5 / 5 | 3,500 | 4.3 / 5 |
| Learning Resources Simple 3 Button StopwatchLearning | 4.5 / 5 | 3,000 | 4.3 / 5 |
| Sports YS-802 StopwatchSports | 4.2 / 5 | 2,000 | 4.2 / 5 |
Similar stopwatches from other brands
Questions about the Mechanical stopwatches
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the SXJ505 stopwatch need batteries?
No, it is a mechanical, spring-driven stopwatch.
How much does it weigh?
190 grams.
Can it record split times?
The listing does not describe split-time or memory functions, so treat it as a basic single-time stopwatch.