BTXETUEL

SayoDevice O3C OSU Keyboard Rapid Trigger Hall Switches Magnetic Linear Switches Keyboard with Knob and Screen Copy Paste

92+ bought in the past month

$45.99

About this item

  • 【O3C OSU SayoDevice Keyboard】This keyboard with 3 Hall magnetic linear switches, 1 knob, 1 screen! TYPE-C,USB 2.0 high-speed 8000HZ.
  • 【Replaceable Switches】Supports any Hall magnetic Switches, with a simple click for calibration.
  • 【IPS color Screen】With 0.96 inch IPS color screen,160*80 Resolution, visible key range and button counting.
  • 【Custom Screen】The first line of text on the screen can be customized, such as writing your own ID.
  • 【Custom Knob】The knob can also be set with any key, such as to scroll through the song list.
  • 【NOTICE】Sometimes, the keyboard needs to do "CALIBRATION" ( The steps are shown in the figure ) before use for the first time or after firmware upgrade.
$45.99

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Product details

BrandBTXETUEL
Compatible DevicesLaptop, Mac, PC
Connectivity TechnologyUSB-C
Keyboard DescriptionGaming
Recommended Uses For ProductGaming
Special FeatureRGB
Colorwith osu keycaps--black
Keyboard backlighting color supportRGB
StyleGame
Product Dimensions2.52"L x 2.01"W x 1.5"H

Technical specifications

product_dimensions2.5 x 2 x 1.5 inches
item_weight5.6 ounces
manufacturerBTXETUEL
item_model_numberSayodevice-O3C
best_sellers_rank#2,246 in Video Games ( See Top 100 in Video Games ) #171 in PC Gaming Keyboards
is_discontinued_by_manufacturerNo
date_first_availableMay 25, 2023

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Customer reviews

4.71,185 ratings

Customers say

Customers find the keyboard's build quality excellent, with one noting it's better than most keyboards and mice. Customers appreciate its customization options, with one highlighting the precise software settings, and its responsive design, with one noting improved single-tapping speed.

★★★★★

Customization,Ease of use,Reactivity

Levi MendozaOctober 10, 2025

Amazing 8000 hz polling rate the reactivity is amazing especially for games like geometry dash/Osu it functions very well and has a volume knob very useful if you have a smaller keyboard without normal sound function keys, its easy to connect and was pretty comparable off the start. Read more

Review image 1Review image 2Review image 3
★★★★★

Wonderful product - slow shipping.

pugapoo_ownerDecember 29, 2025

I almost gave this product only 4 stars because in the world of Amazon, this item ships SLOW. Just be prepared for that. As far as actual quality - worth the wait. Exactly what my son was looking for. He now uses it daily. Functions exactly as it should and has enhanced his game play. Read more

★★★★★

Awesome product.

AlejandroDecember 7, 2025

Fast and receptive; perfect for playing geometry dash; slightly annoying click sound Read more

Review image 1
★★★★★

Sayo device review

LigaDecember 30, 2025

The product feels high quality. The switches are really good and responsive. If you buy this product make sure you callibrate it with the inbuilt callibration tools. Read more

★★★★☆

Very good!

DashelDecember 6, 2025

I used the Sayo device for Geometry Dash, and it works extremely well! I got the settings that worked well for me, but at first, I had to recalibrate it since the key automatically spammed the first button, which was really easy to do. It comes with black keys on it and a set of white keys if you want to change it! It was small and easy to plug in, and I love how it has a screen, and you can put custom videos or whatever on it! I bought the black Sayo device and it went well with my setup! Read more

★★★★★

So any more features than I realized

Jena K EvansJuly 14, 2025

Got this for my kiddo who plays geometry dash and honestly I'm geeking out on this way harder than he even is. It's so incredible all the different functions it has I haven't even figured it all out yet but this was definitely a solid purchase. It looks and feels really nice too. The size is perfect and there is zero lag. As far as I'm aware it doesn't connect with Bluetooth, as it shouldn't sense Bluetooth is not the kind of thing you want to use if you want to skirt lag. Definitely make sure you have a proper cable though, I do not believe for a half a second that the cable this thing comes with is proper. Make sure you get at least a 5 gig data cable USB-C Read more

★★★★★

Amazing device, only way to describe it.

OrozcoNovember 23, 2025

The media could not be loaded. It’s crazy how this little device makes you improve a lot in (my case) geometry dash. And it’s pretty cool small tech, too, with the little screen. The 8000hz and rapid trigger functionality makes this absolutely worth it for timings. I heavily recommend if you’re onto GD. Didn’t believe the hype, now I do. Read more

Review image 1
★★★★★

Works well!

MariaDecember 31, 2025

My grandson wanted this for his computer and was thrilled with it, Easy to install and used almost instantly! Read more

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