Extech STW515 Stopwatch with Backlit Display
- Screen Size: 5.5
- Number Of Settings: 7
- Material Type: Plastic
- Item Weight: 0.2 pounds
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A compact, single-purpose handheld stopwatch built for straightforward interval, lap and race timing rather than wrist-worn or connected features.
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ASIN: B07R8HHFLCModel: STW515Category: Stopwatches
Overview
The Extech STW515 is a handheld stopwatch weighing 3.2 ounces, sized at 2.6 inches deep, 0.8 inches wide and 3 inches tall in a green case. It is built for timing intervals during training, races or lab work rather than for GPS tracking or heart rate.
Extech is better known for test and measurement instruments than fitness gear, and the STW515 reads as a basic single-function stopwatch rather than a multi-sport timer. Its small, light build points to a pocketable design for coaches or officials rather than a wrist-worn training tool.
- 3.2 oz handheld design
- 2.6 x 0.8 x 3 inch case
- Green colorway
- Model STW515
Who it's for
Fits coaches, referees, lab technicians or anyone needing a dedicated handheld timer for intervals or races. Not for runners wanting a wrist-worn or GPS-enabled device.
Pros and cons
- Small and light at 3.2 ounces
- Dedicated single-purpose timer
- No lap memory or water resistance specs given
- No description of button layout or display
Performance notes
As a handheld stopwatch, the STW515 is built around simple start, stop and lap timing rather than connected features. Its compact size and light weight make it easy to hold or clip during a session, though the listing does not specify lap memory count or water resistance.
Specifications
| Brand | Extech |
|---|---|
| Model | STW515 |
| Dimensions & fit | |
| Screen Size | 5.5 |
| Item Weight | 0.2 poundshigher than 77% of 32 stopwatches |
| Item Dimensions D X W X H | 2.6 × 0.8 × 3 inches |
| Construction & materials | |
| Material Type | Plastic |
| Color | Green |
| Included components | |
| Unit Count | 1 |
| Included Components | Complete with meter, CR2032 battery and 39" (1 m) snap-away neckstrap |
| Warranty & support | |
| Manufacturer Warranty Description | 1 year. |
| Other details | |
| Number Of Settings | 7 |
| Item Type Name | Stopwatch |
Closest rivals on specs
ACCUSPLIT AX725 Dual Line 16 Memory Stopwatch- Item Weight 0.2 vs 0.18 pounds (+11%)
Frequently asked questions
What is the Extech STW515?
It is a handheld stopwatch for timing intervals, races or lab sessions.
How big is the STW515?
It measures 2.6 inches deep, 0.8 inches wide and 3 inches tall, and weighs 3.2 ounces.
What color does the STW515 come in?
Green.