# Keychron B1 Pro — Ultra Slim Wireless Keyboard

> 【国内正規品】Keychron B1 Pro ウルトラスリム ワイヤレスキーボード summary. Ultra-slim scissor-switch keyboard with JIS kana layout, triple-mode connectivity, 1,200-hour battery life, and ZMK customization

Tags: keyboard, keychron, b1-pro, wireless, ultra-slim, jis-layout
Source: https://www.amazon.co.jp/dp/B0FDQZ6BL8
Article page: https://web-autoai.com/articles/keychron-b1-pro?lang=en

Prices and ratings change over time — check the article page for the current values.

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This article covers 【国内正規品】Keychron B1 Pro ウルトラスリム ワイヤレスキーボード.

## Overview
The Keychron B1 Pro is the latest ultra-slim wireless keyboard from the brand, featuring a scissor-switch mechanism and a full JIS layout with kana legends. At roughly 6mm thick, it supports three connection modes—2.4GHz wireless, Bluetooth 5.2, and USB-C wired—and runs on a single AA battery for up to 1,200 hours of use. ZMK firmware customization is also supported, making it a versatile choice for both office and mobile setups.

## Connectivity & Compatibility
This keyboard connects via a 2.4GHz USB-A dongle, Bluetooth 5.2, or a USB-C cable. It works with Windows, macOS, Linux, iOS, and Android, and switching between devices is handled by a dedicated key. The JIS layout with printed kana means Japanese users can type without any layout adjustments.

## Product Info
Released in late 2024, the B1 Pro is available through Japan and other domestic channels. The package includes a USB-A dongle, a USB-C cable, and a silicone cover. Warranty is standard one year.

## Best Use Cases
Mobile workers and frequent travelers: The ultra-slim body (approx. 200g) and 1,200-hour battery life make it ideal for slipping into a laptop bag without worrying about charging. Office users who need quiet typing: Scissor switches produce less noise than mechanical ones, making them suitable for open-plan offices or meeting rooms. * Multi-device users: Up to three paired devices can be switched with a single key press, covering PC, tablet, and phone setups.

## Things to Consider
This is not a mechanical keyboard, so the typing feel is shallower. Heavy typists may prefer a mechanical board. ZMK customization requires a web-based editor rather than dedicated software. The keyboard runs on a single AA battery only—no rechargeable battery option. ## Alternatives
The K380 lacks 2.4GHz support and JIS layout options. The Keychron B1 Pro offers both 2.4GHz and Bluetooth with a JIS kana-printed layout, making it a more practical choice for Japanese users.

### Product Disclosure (Amazon)
- Manufacturer: Keychron
- Seller: Keychron Japan
- Fulfilled by: Amazon
- ASIN: B0FDQZ6BL8
- Note: This article covers a manufacturer-made product based on Amazon listing details.