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Hertz Donut MKIII

Marsoni M251S
Sale price$262.50
Pay 4 payments of $65.62 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Hertz Donut MKIIIThe long awaited Hertz Donut mk3 from Industrial Music Electronics (fka The Harvestman) is a multi operator digital oscillator for eurorack modular synthesizers. Fixated on both FM synthesis and phase distortion synthesis, this behemoth executes thru zero frequency modulation with the utmost precision (and an unhealthy dose of turpitude). The Hertz Donut mk3 is inflicted with four sliders that collectively constitute a sophisticated patch matrix for
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
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4.4 ★★★★★
Based on 1578 reviews
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Verified Purchase
Don Martin
Houston, US
★★★★★ 4
Cool tool
Size: 0.5 Fl Oz (Pack of 1)
I think this is gonna work pretty good but I haven't used it enough to pass judgment yet.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 22, 2025
T
Verified Purchase
tatiana
Pawtucket, US
★★★★★ 5
this metal roller is cold and refreshing, and the formula feels clean and fresh
Size: 0.5 Fl Oz (Pack of 1)
This under-eye roller is so good, I had to buy it again after my husband took it from me lol. The metal roller is always cool, and it's a nice, refreshing wake-up.
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Reviewed in the United States on May 4, 2026
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Verified Purchase
Christine Sievert
Louisville, US
★★★★★ 3
Time will tell…
Size: 0.5 Fl Oz (Pack of 1)
This feels really good going on, nice cooling effect. Not sure that it is doing much for my eye bags or dark circles. I’m going to Keep using it until it’s gone mainly because it feels nice. It’s not sticky, feels like a gel, but very cooling.
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Reviewed in the United States on April 13, 2026
A
Verified Purchase
Anita Gottschalk
West Palm Beach, US
★★★★★ 1
Burns if leaches into eyes.
Size: 0.5 Fl Oz (Pack of 1)
Do not get this product in your eyes! It really burns. Sometimes it will leach into eye and then the pain begins. I have used other eye rollers without any discomfort if accidentally goes into eyes . Please be careful. I will never order this again.
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Reviewed in the United States on April 29, 2026
F
Verified Purchase
FussyShopper
Bozeman, US
★★★★★ 5
Reduces Eye Bags, for men and women
Size: 0.5 Fl Oz (Pack of 1)
I've tried a bunch of gels, creams and extracts to help reduce the eye bags which grew larger as I aged. Now at 70 years, I thought maybe my skin wasn't able to improve any more. After seeing a caffeine based cream to reduce fat on other area of the body, I would apply coffee grounds powder under my eyes and thought I did notice a difference. When I saw this roller containing caffeine I decided to try for it's ease of use. I immediately noticed a distinct difference! While the bags did not disappear altogether, they were reduced enough that I didn't wonder if they were smaller, I could see they were. I think this is marketed to men so the packaging is plain not girly and it's unscented. I don't care as long as it works. It also has a metal roller ball as applicator which is cold on the skin without having to refrigerate it. I researched the list of ingredients, all of which are deemed to be safe. Some may be irritating if you have sensitive skin, but they are not toxic if applied topically ( but can be, if taken internally or used in high doses, so don't eat it or bathe in it and you'll be ok.) I have best results when I use it morning and night but it still makes a difference if I just use in the morning. I also blend a concealer only on the shadow part of the eye bag and it disappears even more. Very reasonably priced for a safe and effective cosmetic product in a market of hype and over-priced products. Recommended.
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Reviewed in the United States on November 6, 2024

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