This article covers 「国内正規品」Keychron B2 Pro Bluetooth.

Overview

The Keychron B2 Pro is an ultra-slim 96% wireless keyboard that packs a full numpad into a compact form factor just 14mm thick. It offers three connection modes—2.4GHz, Bluetooth 5.2, and USB-C wired—making it a versatile companion for multi-device setups. With QMK firmware support and the Keychron Launcher web app, you can remap every key without installing any software.
A 800mAh battery delivers up to 300 hours of use over Bluetooth, while 2.4GHz and wired modes achieve a 1000Hz polling rate for near-instant response. The keyboard is fully compatible with macOS, Windows, and Linux, with a physical switch to toggle OS-specific key layouts.

Connectivity & Compatibility

The B2 Pro supports three connection methods: 2.4GHz wireless (via included USB dongle), Bluetooth 5.2, and USB-C wired. In 2.4GHz and wired modes, the polling rate is 1000Hz, ensuring low latency for gaming and precise work. Bluetooth mode allows pairing with up to three devices and switching between them instantly.
Compatibility extends to macOS, Windows, and Linux—the side switch automatically adjusts modifier keys (Command/Ctrl, etc.) for each OS. It also works with iOS and Android devices over Bluetooth, making it a true cross-platform keyboard.

Product Info

Released in 2025, the Keychron B2 Pro sits in the mid-to-high tier of wireless keyboards, offering a rare combination of slim design, numpad, and QMK programmability at an affordable price. The retail price is around ¥6,930 (approximately $45 USD), which is excellent value for a QMK-compatible wireless keyboard with a 1000Hz polling option.
The keyboard comes with a USB-C cable, 2.4GHz dongle, keycap puller, a few extra keycaps, and a manual. Warranty is the standard one-year manufacturer coverage. It is available through online retailers and other online retailers.

Best Use Cases

  • Multi-device users: If you frequently switch between a PC, Mac, tablet, and phone, the B2 Pro’s Bluetooth multi-pairing and instant switching save time and clutter. The 2.4GHz mode provides a stable, low-latency connection for desktop use.
  • Space-conscious professionals: Need a numpad but hate the bulk of a full-size keyboard? The 96% layout is about 10cm narrower than a standard full-size board, freeing up desk space while keeping all essential keys.
  • Customization enthusiasts: QMK firmware lets you remap any key, create macros, and adjust layers. The Keychron Launcher runs in a browser, so you can tweak settings on any OS without installing software.
  • Quiet typing environments: The scissor-switch mechanism (low-profile, non-mechanical) produces a soft, quiet keystroke, making it suitable for open offices, libraries, or shared workspaces.
    However, hardcore gamers may prefer a mechanical switch keyboard for tactile feedback, and users accustomed to full-size numpad spacing might need a short adjustment period.

Product Disclosure (Amazon)

  • Manufacturer: Keychron
  • Seller: Keychron Japan
  • Fulfilled by: Amazon
  • ASIN: B0FG2PFBFK
  • Note: This article covers a manufacturer-made product based on Amazon listing details.