

🎮 Elevate your command center with the SayoDevice O3C — where speed meets style and customization rules.
The SayoDevice O3C OSU 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. Designed for professional gamers and power users, it supports hot-swappable switches with easy calibration and delivers ultra-fast 8000Hz USB Type-C connectivity, making it a top-tier accessory for precision input and workflow customization.








| ASIN | B0C5JTVQNN |
| Best Sellers Rank | #10 in Computer Keyboards |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,629) |
| Date First Available | May 17, 2023 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 5.6 ounces |
| Item model number | Sayodevice-O3C |
| Manufacturer | BTXETUEL |
| Product Dimensions | 2.52 x 2.01 x 1.5 inches |
P**R
Wonderful product - slow shipping.
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.
B**Q
AWESOME FOR GD
ive been using this for a couple months and no issues, ive gotten 100k clicks on the middle key and it still works great. the rapid trigger is super responsive and perfect for gd.
M**R
Great for gd
Great for geometry dash, super satisfying to fiddle with. I went from nine circles being my hardest to beating denouement and getting 71% on acu. All in one month btw.
L**A
Customization,Ease of use,Reactivity
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.
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.
S**R
Setup issues
The BTXETUEL SayoDevice OSU O3C is an excellent tool for improving gaming performance, but it’s extremely difficult to connect it to a computer—especially to a MacBook, in my case. Once the setup page opens in the browser, all the instructions are in Chinese, and clicking around randomly doesn’t seem to help at all. I eventually managed to get my computer to connect to the device, but I honestly have no idea what I did to make it work. The developers really need to put more effort into this aspect, otherwise it’s almost discouraging to invest in a gadget that appears not to function properly. However, once this nightmare is over, the device is very enjoyable and effective to use.
A**A
Great gaming device
12 year old was able to program on his own and is thrilled with performance of this Sayo. He uses it for Geometry Dash game. You can use it with an iPad or laptop. Great tutorial by a British young man who teaches how to program it for iPad usage.
J**S
So any more features than I realized
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
R**H
Excellent 👌
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.
H**E
Muito bom. Meu filho ficou muito satisfeito e está craque no Geometey Dash.
A**N
It works so well for every rhythm game and easy to change the key binds of the keys the website helps a ton and it has amazing settings and a cool display the keys activate instantly when you press down with an 8000hz polling rate meaning it sends 8000 reports of clicks per second as well as keyboard switches that activate when you press on it with the lightest amount of click you could drop a feather on a key and it would activate making it the most precise keyboard at this value (1 small issue after 2 years of constant use one key sometimes doesn't work but if you play osu or gd you only need 1 or 2 keys out of 3)
Trustpilot
2 days ago
2 weeks ago