This article covers 【国内正規品】Keychron K4 Pro ワイヤレス・カスタムメカニカルキーボード.

Overview

The Keychron K4 Pro is a wireless mechanical keyboard that packs a full numpad into a compact 96% layout. It's an excellent choice for users who need number entry but want to save desk space. The keyboard supports both USB-C wired and Bluetooth 5.1 wireless connections, and it's fully programmable via QMK/VIA. This particular variant comes with Keychron K Pro Blue switches and a hot-swappable PCB, allowing you to change switches without soldering. The keycaps are OSA-profile double-shot PBT, offering good oil resistance and a satisfying feel. The south-facing RGB backlight provides over 22 lighting effects and is compatible with Cherry-profile replacement keycaps.

Connectivity & Compatibility

Connectivity options include USB Type-C (wired) and Bluetooth 5.1, which can pair with up to three devices simultaneously. Switching between a PC, Mac, tablet, or phone is seamless. The keyboard is compatible with Windows, macOS, and Linux out of the box, and it includes extra keycaps for Mac users. The layout is US ANSI; Japanese layout users should look for the JIS variant. Wired mode supports full N-key rollover, ensuring accurate input during gaming or fast typing. Bluetooth performance is stable for everyday use, but for competitive gaming, a wired connection is recommended to minimize latency.

Product Info

Released in 2023, the K4 Pro sits in the mid-to-high-end segment of custom mechanical keyboards. It's distributed in Japan by Copec Japan, with proper technical certification (技適). Pricing is around ¥20,000–¥22,000, which is competitive given the feature set: QMK/VIA support, hot-swap sockets, PBT double-shot keycaps, and south-facing RGB. The package includes a USB-C cable, Mac/Windows keycap sets, keycap and switch pullers, and a hex key. The manufacturer's warranty is typically one year.

Best Use Cases

  • Space-conscious power users: The 96% layout keeps the numpad while reducing width to about 37 cm, leaving more room for mouse movement. Ideal for office work, accounting, or any task requiring frequent numeric input. - Customization enthusiasts: Full QMK/VIA programmability means you can remap every key, create macros, and set up layers for gaming or productivity. Great for streamers, video editors, and programmers who want to optimize their workflow. - Switch tinkerers: Hot-swap sockets let you try different switches without soldering. If the clicky Blue switches are too loud, you can swap in silent linears or tactile switches later. - Multi-device workers: Bluetooth pairing for up to three devices makes it easy to switch between a desktop, laptop, and tablet. For gaming, wired mode is recommended to minimize latency. Note that some function keys may have limited functionality over Bluetooth; check the official documentation for details.

Product Disclosure (Amazon)

  • Manufacturer: Keychron
  • Seller: SUPERKOPEK
  • Fulfilled by: SUPERKOPEK
  • ASIN: B0C9ZZJ1MV
  • Note: This article covers a manufacturer-made product based on Amazon listing details.