Theremini 4011 DIY Kit

Marsoni

M251S

$89.00

Get it in 3 business days with 1 day shipping. Friday, May 29

Theremini 4011 DIY KitthereBackground: THEREMICRO TEREMINI is the nickname for the simplest type of capacitive sensor, that in the past has been given the name theremin (originally termenvox by his inventor Lev Sergeyevich Termen). The invention goes hand in hand with the pioneering years of radio electronic amplification the 1920s. In fact, it is a cast away of the development in the field of radio namely: the heterodyne (frequency mixing) principle and the observation of

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These pillow cases are great for my hair and skin. They look good, hold up well in the washer and dryer, and the price is great. They are cooling. Of course I wish they could be more cooling, but honestly I'm not sure that's even possible. Great pillow cases. Already bought more for other heads. Would buy again.

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Reviewed in the United States on March 11, 2026

Verified Purchase

Melissa

Houston, US

★★★★★ 1

Hot hot hot. Side sleepers will hate it

At first touch, these are the coldest pillowcases I own … but only for seconds. Once you actually lay on them, within seconds they adjust to your body temp, the heat feels trapped, my head begins to feel hotter than before I laid down - which has in turn caused me loathe these pillow cases. I hate that I have missed the return window. Would never buy again, would never recommend. My satin ones aren’t even this hot! I gave them the good ole 30-day try. Side sleepers - if you are like me and sleep on your side with arm tucked under pillow - flipping this pillow over in hopes of a cold side - forget it, it’s already hot from your arm.

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Reviewed in the United States on August 29, 2025

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Trevor Barton

Belleville, US

★★★★★ 2

Ehh

Pills up rather quickly

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Reviewed in the United States on June 7, 2026

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Dorothy Gilbertson

Fort Morgan, US

★★★★★ 3

Nice but dissapointing

So it sometimes stays cool but if it’s under a blanket and you have your body on it at all it will get warm but the spots you don’t use will get cool sometimes. I am very disappointed in the material though because it’s like my dry skin scratched the pillow case all over which makes me question it and I don’t think I would buy again.

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Reviewed in the United States on December 15, 2025