★★★★★ 4
Smaller than I thought it would be
Nice watch, very small, definitely a woman's or child's watch
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2025
JSI Synth Resonator - Polymoog Formant Filter
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
JSI Synth Resonator - Polymoog Formant FilterFully tested, perfect working condition. In new condition built from a kit. About Used Items: All modules include a power ribbon cable and M3 screws. Please be aware that although all used items have been tested to work as they are designed, they are sold "As Is" and are not accepted for returns unless there is a defect in the used item. Used items DO NOT qualify for Free Shipping, if you order a new item with a used item you will be charged shipping
Quick Dispatch:
Your JSI Synth Resonator - Polymoog Formant Filter 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 JSI Synth Resonator - Polymoog Formant Filter ships.
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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
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4.2 ★★★★★
Based on 550 reviews
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Product Reviews
★★★★★ 5
Works in the pool!
This is my second watch like this. I wear it almost every day, including in aqua class. I like the size - big enough to read easily, but not too big. I originally bout this watch because I wanted an inexpensive watch to wear to the gym. I find myself reaching for it even when I am not going to the gym!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 28, 2017
★★★★★ 1
Stopped working
Maybe it's a one-off but it stopped working very shortly after I received it and I had to return it. Casio used to be a good brand.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 21, 2025
★★★★★ 3
light not strong enough
light not strong enough
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Reviewed in the United States on February 3, 2023
★★★★★ 5
Great watch!
I like how thin & lightweight it is. The blue numbers makes the watch more appealing!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 8, 2019
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