

🎮 Elevate your command center with the SayoDevice O3C — where precision meets personalization.
The SayoDevice O3C Black Keyboard is a compact, high-performance mini keypad featuring 3 Hall magnetic linear switches, a customizable 0.96-inch IPS color screen, and a multifunctional knob. It supports hot-swappable switches and connects via ultra-fast 8000Hz USB-C, making it ideal for professionals and gamers seeking responsive input and personalized control in a sleek, portable form factor.








| ASIN | B0C5JTVQNN |
| Additional Features | Magnetic |
| Antenna Location | Gaming |
| Best Sellers Rank | #4 in Computer Keyboards |
| Brand | BTXETUEL |
| Button Quantity | 3 |
| Color | black |
| Compatible Devices | Laptop, Mac, PC |
| Connectivity Technology | USB-C |
| Customer Reviews | 4.7 4.7 out of 5 stars (848) |
| Enclosure Material | Plastic Or Metal |
| Hand Orientation | Ambidextrous |
| Item Dimensions L x W x H | 2.52"L x 2.01"W x 1.5"H |
| Keyboard Backlighting Color Support | RGB |
| Keyboard Description | Gaming |
| Keyboard Layout | QWERTY |
| Manufacturer | BTXETUEL |
| Model Name | Sayodevice-O3C |
| Model Number | Sayodevice-O3C |
| Number of Keys | 3 |
| Power Source | USB power |
| Style Name | Game |
| Switch Type | Linear |
| Unit Count | 1.0 Count |
| Warranty Description | 2 YEAR |
J**I
Perfect Size and Super Responsive
This keypad is the perfect mini size for GD and doesn’t take up any space. The keys feel light and fast because of the hall effect switches, and the screen actually looks really nice in person. It made my inputs way more reliable when playing harder levels.
J**N
My favorite Keyboard Add-on and a Cool Storage Technique for it
Extremely satisfying to use. Even when I am not playing geometry dash with it, I use it. I have the dial set to volume up/down and escape. I have even set customized profiles for different applications and set different RGB profiles with them so I can differentiate keybinds with ease. I haven't done this, but you can even set multiple keys to activate at once, all in one keypress. Could be helpful for frequently used shortcuts. COOL NOTE: If you have a tempered glass side panel on your PC, ensure it is clean, along with the bottom of your sayo (the silicone feet pads), and stick it to the glass (literally zero adhesive, only the feet pads). This is so satisfying and holds up really REALLY well. No joke, when I remove it from the glass, it sometimes pulls the PC with it. This is how I have stored my sayo when not in use. It has stayed up for literal months with zero problem. In this configuration, I have a volume knob on the side of my PC case which I use ALL THE TIME. NGL, I think I would have gotten it just for the volume function.
A**R
Ups your gaming!!
This Sayo device came highly recommended so my son wanted to try it. HE LOVES IT! It’s helps with repetitive and quick movements in games. Works great with many different games. Just plug it in and play no set up needed and compatible with any used set up. The keys are now loud either!
K**H
Amazing product, improved my GD skills! The only issue is that the website goes down often.
It’s very fun to use, the amount of customization feels amazing, and I think it’s fun how loud the clicking sound is. By far the most responsive controller I’ve ever held. I don’t play osu!, but I do play GD a lot, and the ability to spam and click precisely has improved a lot. It has allowed me to complete my new hardest, MikuMikuMiku. One massive downside is that there is no app you can download. You have to configure its settings on the website, which has gone offline multiple times since I’ve had this device. Unless you’re able to play your games with the default settings (Z, X, and C for the keys), the keybinds reset every time the device is turned off, and you have to reopen the website to restore them.
W**R
Sayo Device
This Sayo Device is exactly what my son wanted for his birthday to use for playing geometry dash. He is happy so I am happy 😁
J**H
How
So uh I bought this yesterday and today I'm writing this because I beat bloodbath today with the Sayo and I don't really have much words because it's my first time using one. What I can say is that the Sayo is VERY responsive and it's a huge improvement from your keyboard if you play gd. About sound, it can be very loud so I recommend changing switches when you can to some better ones that sound better and have the same responsiveness as the ones in the Sayo. And that's it I really like it because it helped me beat Bloodbath ig.
V**A
Works well.
I’m gonna be honest as a parent I have no idea what this does but my son uses it and he says it helps him on the game that he plays.
C**O
Crazy for timing games
If you play timing games this thing is a GAME CHANGER. The rapid trigger makes inputs super responsive, you’ll notice it immediately. Insanely happy with this
M**.
My 13 year old son asked for this to play Geometry Dash on his laptop. I was sceptical but it is a really cool device with a little screen that he can customise with his own images/photos, I think he can change the colour of the lights under the keys and it also came with both black and white keys so he could choose which ones he liked best. I don't know much about it but it looks really good and he is very happy with the functionality.
A**O
Compré este teclado compacto con interruptores magnéticos Hall para usar en juegos y tareas rápidas, y la verdad es que me ha sorprendido. La sensación de las teclas es muy fluida y responde rápido, especialmente al jugar o hacer atajos. La pantalla y la perilla son detalles útiles que no esperaba y le dan un extra de personalización práctico, sobre todo para macros o accesos directos. El tamaño es ideal para tenerlo junto al teclado principal sin ocupar mucho espacio. La configuración inicial fue sencilla y no he tenido problemas de conexión desde entonces. En general cumple bien para su precio y me ha resultado una herramienta versátil para juegos y productividad
K**M
أبنائي يستخدمونه في لعبة جيوماتري داش ، ممتازة.
B**N
Knoppen afzonderlijk programmeerbaar. Dit device is van hoge kwaliteit! Wordt geleverd met USB naar usb-c kabel. Gebruik je uitsluitend usb-c, koop er dan een usb-c kabel bij. Klikt snel en foutloos!
M**.
Good product. Came just as described and worked perfectly.