


Observational Research Stopwatch
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Observational Research StopwatchA unique stopwatch which allows the timing of a subject without disturbing it. For captive and field research, or in classrooms. Hands free operation allows for freedom of movement. The alarm is audible only through a headphone. The alarm can be set for repetitive intervals of every 0. 25 second to every hour. Two 1 100th second displays. Counts up or down to 10 hours. Ideal for multiple and simultaneous processes. In stopwatch mode, current lap time
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4.0 ★★★★★
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Product Reviews
★★★★★ 5
Cute slip-ons - so easy and quick!
Size: 13 Little Kid, Color: Hot Pink/Multi
These shoes are adorable, comfortable according to my kid, and super easy to pull on!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 17, 2026
★★★★★ 5
Durable
Size: 6 Big Kid, Color: Aqua/Multi
Good shoes. True to size
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Reviewed in the United States on February 18, 2026
★★★★★ 5
Her go to pair!
Size: 13 Little Kid, Color: Lavendar
Good quality shoes and she loves them! Slips her foot right in! Her go to pair !
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
★★★★★ 5
It’s a perfect shoe without the correct width it needed to be wider
Size: 5 Big Kid, Color: Lavendar
The app suggested a 6.5 but I needed it in wide and it was not an option.
I had to send them back because they were too tight!
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Reviewed in the United States on April 11, 2026
★★★★★ 5
That the shoes got here in time.
Size: 10.5 Little Kid, Color: Light Pink
The shoes a perfect.
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Reviewed in the United States on April 20, 2026