Skip to content

Observational Research Stopwatch

Marsoni M251S
Sale price$49.95
Pay 4 payments of $12.49 a month.Shop Pay
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
Easy Shipping

Quick Dispatch:

Your Observational Research Stopwatch orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your Observational Research Stopwatch ships.

Need Help?
Questions about Observational Research Stopwatch, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for Observational Research Stopwatch in your area.

Get Shipping Estimates

Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.9 ★★★★★
Based on 785 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
N
Verified Purchase
norma torres aguilar
Bozeman, US
★★★★★ 5
Repuestos para ford
Excelente, quedó muy bien en mi auto. Para pedir este tipo de productos se tiene que tener la seguridad de lo que está ordenando uno.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 12, 2026
T
Verified Purchase
Trisha Langteau
San Leandro, US
★★★★★ 5
Solid refurbished part good quality
Correct part , works well and was easy to install
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 12, 2026
M
Verified Purchase
Mike C
Cuba, US
★★★★★ 5
Starter
Works great in my Ford Escape
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 28, 2026
B
Verified Purchase
b
Boise, US
★★★★★ 5
Price and quality
Awesome and reasonable price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 25, 2025
A
Verified Purchase
A_CPA
Pawtucket, US
★★★★★ 5
Two Filters, Quick and Easy
Size: 16-23 Tacoma, Size: 16-23 Tacoma
The RVgolf Engine+Cabin Air Filters Kit for the Toyota Tacoma V6 comes with two air filters. There is a cabin air filter that fits nicely into the compartment accessed through the glove box and an engine air filter that dropped in easily in the compartment under the hood. Replacement of both filters was easy, didn’t require any tools, and it took more time to empty and replace the items in the glove box than it did to replace both filters. The Toyota dealership quoted me $80 to replace the cabin air filter only. I replaced both filters for less than $30. The filters felt like they were good quality. The engine air filter is multi-layered, with a thin foam layer to keep larger debris from blocking the finer paper filter. The cabin air filter said and looked like it had a carbon layer to absorb smells. The only concern I had was size. After I had replaced both filters I went to slide the engine air filter I replaced into the RVgolf box to throw it away. The engine air filter I replaced would not slide into the RVgolf box. It was too big. After driving for a few days and a couple of hundred miles, I popped the hood and checked the fit of the engine air filter. The fit looked perfect. See attached photos.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026

recommand products