This article covers SayoDevice O3C++ OSU キーボード Rapid Trigger ホール磁気リニアスイッチ.

Overview

The SayoDevice O3C++ OSU Keyboard is a compact mini keypad purpose-built for rhythm games like osu!. It features four hall-effect magnetic linear switches, four auxiliary keys, a rotary knob, and a 0.97-inch IPS color screen. The USB-C connection supports up to 8000Hz polling rate, making it ideal for players who demand minimal input latency.
Beyond osu!, the device can be programmed with macros for copy-paste, screen capture, and other shortcuts. The switches are hot-swappable and calibrate with a single click. An aluminum chassis gives it a premium feel, fitting well on any gaming or creative desk.

Connectivity & Compatibility

  • Connection: USB-C (USB 2.0-compatible) with an included cable. Works with Windows, macOS, and Linux.
  • No special drivers required; the device is recognized as a standard keyboard. For full customization (screen, knob, macros), the vendor's software is available (Windows recommended).
  • Can be used as a standalone keypad or as a left-hand companion to a full-sized keyboard. Also works with consoles that support USB keyboards.

Product Info

The SayoDevice O3C++ OSU Keyboard is an entry-to-mid-range mini keypad sold exclusively on online retailers. It launched in late 2023 and retails for around ¥5,999. It competes with dedicated osu! controllers (e.g., Glorious Model O) and macro pads like Razer Tartarus, but stands out with its hall-effect switches and integrated screen. The package includes only the keypad and a USB cable; keycap puller and extra switches are sold separately. Manufacturer warranty is 1 year.

Best Use Cases

  • Rhythm gamers (osu!, BMS, StepMania): The hall-effect linear switches provide a light, consistent actuation with Rapid Trigger support for adjustable actuation point. Great for fast repeated taps and precise timing. Not ideal for players who prefer heavy tactile feedback.
  • Content creators and editors: Assign the knob to timeline scrubbing or volume control, and the screen to display clip names or shortcuts. Frees up desk space compared to a full keyboard. Less useful if you already own a Stream Deck or similar macro pad.
  • Space-conscious gamers: The 88x88mm footprint fits next to a tenkeyless keyboard. Can be used as a left-hand auxiliary pad for FPS weapon swaps or building commands. Not a replacement for a full keyboard for typing.

Product Disclosure (Amazon)

  • Manufacturer: BTXETUEL
  • ASIN: B0CH1DZBGP
  • Note: This article covers a manufacturer-made product based on Amazon listing details.