KOMA Elektronik Electret Microphone Sensor

KOMA Elektronik Electret Microphone Sensor

Marsoni

M251S

$39.00

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

KOMA Elektronik Electret Microphone SensorThe Koma Electret Microphone provides a simple solution to use your surroundings as a source of samples. The board features a little trimmer to adjust the gain of the microphone pre amplifier. Use a little screwdriver to adjust the gain according to the printing on the sensor board. Its preferable to adjust the signal level with the trimmer first and only use the level pot of the analog signal interface as a second adjustment stage. The electret

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I did a lot of research before choosing this keyboard, and man am I glad I got it! The split is great, very comfortable. The arch is minimal, but it does the job. I also really like this scissor-switch technology, no more backspacing to fix a key that didn't register the first time! The built-in wrist rest is also really nice. I type a lot for work, and at a rate of 55 WPM. The keyboard gives just the right amount of feedback, and the keys are not mushy at all. It's also a very good looking keyboard, and is very responsive. I have heard some people mention (not just on this keyboard) that they have some lag/delay with their typing. I would bet the farm that they have plugged the receiver into a USB hub. If you're going to do that, then get yourself a USB extension cable, because the hub will cause interference with ANY wireless dongle you plug into it. Just a foot or so of distance from the hub will alleviate that. I found that out with my prior Logitech keyboard, after lots of searching around for what the cause could be. The ONLY thing I would improve is fairly minor: It does not have dedicated keys for Page Up/Down, Home, or End. You need to hold down the function key and use the corresponding arrow key for those functions. Not even remotely a deal breaker, this keyboard is fantastic in every other aspect.

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Reviewed in the United States on November 22, 2025

Verified Purchase

Sofia

Los Angeles, US

★★★★★ 5

Great Keyboard & Excellent Customer Service

I’ve been using this keyboard for almost 3 years and it has worked great for me the entire time. Comfortable, reliable, and perfect for long hours of work. The customer service was also great — very responsive, helpful, and professional throughout the process. Very happy with the product overall and would definitely recommend it.

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Reviewed in the United States on May 9, 2026

Verified Purchase

Amazon Customer

Lexington, US

★★★★★ 5

Soft keyboards ( updated)

The keys fell off very easily after only 2.5 months of use. It is a nice and smooth keyboard. I like it, but it didn't last even 3 months. I am trying to get it repaired by them since it was so recent that I got it- I will update this review later once I hear from the manufacturer. This is an update to my original post. I am extremely impressed with the quality of customer service and how fast they addressed my concerns regarding the product and they honestly back up their product. Not only did they respond fast, but they also replace my keyboard. Not just fix it, replaced the whole thing and it is also backed by their manufacturer warranty. I’m so happy and love that I get to have my keyboard back to use for hopefully a lot longer this time. It truly is a comfort keyboard and I love how smooth the keys feel when typing for long periods of time. Thanks guys for the prompt response! Today 3/27/2026 I received my brand new keyboard to replaced the one with the broken keys and I’m so happy to it back again and fully working thanks guys for the great customer service. Truly appreciate it.

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Reviewed in the United States on March 24, 2026

Verified Purchase

Christy

Bozeman, US

★★★★★ 5

Great keyboard at the right price

I bought this to replace my old Logi Ergo K860. I like the idea of curved keyboard. But the distance between my left and right hands on Ergo K860 was bothering me ever since I bought it 5 years ago. I would say I never got used to it. The Ergo started to act up one day with one key F not working properly. I tried to fix it and considered getting another one, then I saw this keyboard with a much better price. So I took the chance and went with this cheaper option. I like this one better than Ergo for the following reason: 1. The layout is more comfortable. Yes, it took me a while to get used to it like I would with any keyboard. I don't have to twist my wrists to reach any keys. 2. Keys are not too loud. It's not going to silent, but better than Ergo. 3. Battery life is great. I make a living by typing my keyboard. I only charged this keyboard once so far (4 months). 4. The price is great for what I got.

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Reviewed in the United States on September 7, 2025