# 「国内正規品」Keychron K1 Ultra 8K ワイヤレスメカニカルキーボード 80% US配列バナナ軸ブラック

Tags: keyboard, keychron, k1-ultra-8k, wireless, mechanical, 8k-polling
Source: https://www.amazon.co.jp/dp/B0GX6M7P37
Article page: https://web-autoai.com/articles/keychron-k1-ultra-8k-80-us?lang=en

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

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## Overview
It supports up to 8,000 Hz polling rate over wired and 2.4 GHz connections, virtually eliminating input lag for fast-paced gaming and responsive typing. Equipped with factory-lubed Keychron Milk POM Banana switches, it delivers a tactile feel with a crisp bump. The keyboard combines an aluminum frame with genuine wood accents, LSA doubleshot PBT keycaps, and north-facing RGB backlighting. Battery life reaches up to 490 hours, making it a strong contender for both desktop and portable use.

## Connectivity & Compatibility
The K1 Ultra 8K offers three connectivity modes: USB-C wired, 2.4 GHz wireless via the included dongle, and Bluetooth 5.2. You can pair up to three devices and switch between them effortlessly using the physical toggle on the keyboard. It is fully compatible with Windows, macOS, and Linux. The board runs ZMK firmware, which you can customize through the Keychron Launcher web app for key remapping, macros, and layer adjustments. Hot-swap sockets allow you to change switches without soldering.

## Product Info
Launched in 2025, the Keychron K1 Ultra 8K sits in the high-end segment of wireless mechanical keyboards. The package includes a USB-C cable, keycap puller, switch puller, and a 2.4 GHz dongle. The market positioning is clear: this is an enthusiast-grade keyboard that sacrifices nothing in responsiveness or build quality.

## Best Use Cases
* Competitive gamers: The 8,000 Hz polling rate gives a measurable edge in games where every millisecond matters. Use wired or 2.4 GHz mode for maximum performance. Note that Bluetooth limits to 1,000 Hz, so for esports titles, stick with the faster connections.
* Multi-device professionals: If you switch between a Mac, a Windows PC, and a tablet, the triple-mode connectivity and easy device swap make the K1 Ultra 8K a versatile hub controller. The sturdy aluminum and wood build adds a premium aesthetic to any desk.
* Who should skip: Those who need a full numpad, prefer linear or clicky switches, or are on a tight budget may want to look elsewhere. Also, if you require standard MX-compatible keycaps, note that the K1 Ultra uses a proprietary switch mount, so aftermarket keycap support is limited to compatible profiles.

### Product Disclosure (Amazon)
- Manufacturer: Keychron
- Seller: MIDORI TRADING (輸入品専門店)
- Fulfilled by: MIDORI TRADING (輸入品専門店)
- ASIN: B0GX6M7P37
- Note: This article covers a manufacturer-made product based on Amazon listing details.