Observational Research Stopwatch

Marsoni

M251S

$49.95

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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Reviewed in the United States on May 22, 2026

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TEX

Pawtucket, US

★★★★★ 5

Perfect for MB

Size: 5 Quart (Pack of 2), Style: Full Synthetic, Configuration: 0W-40

Mercedes certified - this oil is very nice, no need to drop loads on oil from MB or the other pricier brands, this stuff works very well.

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Reviewed in the United States on May 21, 2026

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