This article covers Keychron B1 Pro ウルトラスリムワイヤレス ZMK カスタムキーボード プログラム可能 Bluetooth.

Overview

The Keychron B1 Pro is an ultra-slim wireless keyboard that measures just 5mm thick and weighs around 200g, making it one of the most portable full-size keyboards on the market. It supports three connection modes — Bluetooth 5.2, 2.4GHz via a dedicated dongle, and USB-C wired — with an impressive battery life of up to 1,200 hours on a single charge. Designed for productivity on the go, the B1 Pro features quiet scissor-switch keys that keep typing noise to a minimum. It works seamlessly with both Mac and Windows out of the box, and the ZMK firmware allows deep customization through the Keychron Launcher web app. Whether you're hopping between devices or need a keyboard that disappears into your bag, this model delivers.

Connectivity & Compatibility

The Keychron B1 Pro can pair with up to three Bluetooth devices simultaneously, plus one 2.4GHz connection and one USB-C wired link. Switching between them is instant via dedicated hotkeys, making it ideal for multi-device workflows involving a laptop, tablet, and smartphone. Compatibility spans Windows, macOS, iOS, and Android. The keyboard ships with a Mac-layout keycap set but includes a switch to toggle between Mac and Windows modes. Using the Keychron Launcher, you can assign different keymaps per OS — no need to swap keycaps or remember alternate shortcuts.

Product Info

Released in 2024, the Keychron B1 Pro sits in the entry-to-mid-range wireless keyboard segment. It retails for approximately ¥11,272 on Japan, which is competitive for a feature set that includes ZMK customization, triple-mode connectivity, and a 1,200-hour battery. In the box you'll find the keyboard, a USB-C cable, a 2.4GHz dongle, a protective silicone skin, and a quick-start guide. Warranty coverage follows Keychron's standard policy, typically one year from the date of purchase. Market positioning is clear: this is a travel-first productivity keyboard. It sacrifices mechanical switches and RGB lighting in favor of extreme portability, long battery life, and quiet operation. If you need a keyboard that works everywhere without drawing attention, the B1 Pro is a strong contender.

Best Use Cases

Frequent travelers and remote workers: At 5mm thick and 200g, the B1 Pro slides into any laptop bag without adding bulk. The 1,200-hour battery means you can leave the charging cable at home for months. Not ideal if you need a numpad — consider a separate numeric keypad. Mac/Windows dual users: The built-in OS switch and per-OS keymap support via Keychron Launcher make this a dream for anyone juggling a MacBook and a Windows PC. No keycap swapping, no confusion. Quiet office or library typists: Scissor-switch keys produce a soft, muted sound that won't disturb coworkers or fellow students. If you crave the tactile feedback of a mechanical board, however, this may feel too mushy. Customization enthusiasts: ZMK firmware opens up full key remapping, macros, and shortcuts through a browser-based configurator. You can create complex layers and shortcuts without writing a single line of code.

Things to Consider

The B1 Pro uses scissor-switch (membrane) keys, not mechanical switches. The typing feel is light and flat — great for speed, but lacking the distinct tactile bump or click that mechanical fans enjoy. There is no backlight, so working in dim environments requires external lighting. The keycaps are proprietary and cannot be replaced with standard MX-compatible caps. The 2.4GHz dongle stores in the keyboard's bottom compartment, but it's small and easy to lose. For gaming, use 2.4GHz or wired mode for the best polling rate (1,000Hz); Bluetooth polling is lower and may introduce slight latency. ## FAQ
Q: Can I use this keyboard for gaming? A: Yes, for casual gaming. The 2.4GHz mode offers a 1,000Hz polling rate, which is adequate for most titles. However, the lack of N-key rollover and the membrane switches make it unsuitable for competitive FPS or fighting games where every millisecond counts. Q: How long does the battery actually last? A: Keychron rates it at up to 1,200 hours over Bluetooth. At 8 hours of daily use, that's roughly 150 days between charges. 2.4GHz mode consumes more power, but you'll still get several weeks of typical use. Q: How do I switch between Mac and Windows layouts? A: There's a physical switch on the top edge of the keyboard. Flip it to the desired OS, and the key mapping changes automatically. You can customize each OS layout separately in the Keychron Launcher app — no keycap swapping required.

Product Disclosure (Amazon)

  • Manufacturer: Keychron
  • Seller: 輸入品専門店｜Hawaii Store
  • Fulfilled by: 輸入品専門店｜Hawaii Store
  • ASIN: B0D5VFCFWL
  • Note: This article covers a manufacturer-made product based on Amazon listing details.