Keychron
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Keychron K3 Ultra-Slim 75% ISO-UK-Layout Wireless Bluetooth/Wired USB Mechanical Keyboard,84 Keys Hot Swappable Low-Profile Optical Brown Switch White LED Backlit for Mac Windows-Version 2
Keychron K3 Ultra-Slim 75% ISO-UK-Layout Wireless Bluetooth/Wired USB Mechanical Keyboard,84 Keys Hot Swappable Low-Profile Optical Brown Switch White LED Backlit for Mac Windows-Version 2
Keychron K3 Ultra-Slim 75% ISO-UK-Layout Wireless Bluetooth/Wired USB Mechanical Keyboard,84 Keys Hot Swappable Low-Profile Optical Brown Switch White LED Backlit for Mac Windows-Version 2
Keychron K3 Ultra-Slim 75% ISO-UK-Layout Wireless Bluetooth/Wired USB Mechanical Keyboard,84 Keys Hot Swappable Low-Profile Optical Brown Switch White LED Backlit for Mac Windows-Version 2
Keychron K3 Ultra-Slim 75% ISO-UK-Layout Wireless Bluetooth/Wired USB Mechanical Keyboard,84 Keys Hot Swappable Low-Profile Optical Brown Switch White LED Backlit for Mac Windows-Version 2
Keychron K3 Ultra-Slim 75% ISO-UK-Layout Wireless Bluetooth/Wired USB Mechanical Keyboard,84 Keys Hot Swappable Low-Profile Optical Brown Switch White LED Backlit for Mac Windows-Version 2
Keychron K3 Ultra-Slim 75% ISO-UK-Layout Wireless Bluetooth/Wired USB Mechanical Keyboard,84 Keys Hot Swappable Low-Profile Optical Brown Switch White LED Backlit for Mac Windows-Version 2
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Keychron K3 Ultra-Slim 75% ISO-UK-Layout Wireless Bluetooth/Wired USB Mechanical Keyboard,84 Keys Hot Swappable Low-Profile Optical Brown Switch White LED Backlit for Mac Windows-Version 2
Keychron K3 Ultra-Slim 75% ISO-UK-Layout Wireless Bluetooth/Wired USB Mechanical Keyboard,84 Keys Hot Swappable Low-Profile Optical Brown Switch White LED Backlit for Mac Windows-Version 2
Keychron K3 Ultra-Slim 75% ISO-UK-Layout Wireless Bluetooth/Wired USB Mechanical Keyboard,84 Keys Hot Swappable Low-Profile Optical Brown Switch White LED Backlit for Mac Windows-Version 2
Keychron K3 Ultra-Slim 75% ISO-UK-Layout Wireless Bluetooth/Wired USB Mechanical Keyboard,84 Keys Hot Swappable Low-Profile Optical Brown Switch White LED Backlit for Mac Windows-Version 2
Keychron K3 Ultra-Slim 75% ISO-UK-Layout Wireless Bluetooth/Wired USB Mechanical Keyboard,84 Keys Hot Swappable Low-Profile Optical Brown Switch White LED Backlit for Mac Windows-Version 2
Keychron K3 Ultra-Slim 75% ISO-UK-Layout Wireless Bluetooth/Wired USB Mechanical Keyboard,84 Keys Hot Swappable Low-Profile Optical Brown Switch White LED Backlit for Mac Windows-Version 2
Keychron K3 Ultra-Slim 75% ISO-UK-Layout Wireless Bluetooth/Wired USB Mechanical Keyboard,84 Keys Hot Swappable Low-Profile Optical Brown Switch White LED Backlit for Mac Windows-Version 2
Be ready to multitask without missing a beat by connecting the K3 with up to 3 devices via stable Bluetooth 5.1 and switch between your laptop, PC, tablet, and phone seamlessly.
Keychron K3 Ultra-Slim 75% ISO-UK-Layout Wireless Bluetooth/Wired USB Mechanical Keyboard,84 Keys Hot Swappable Low-Profile Optical Brown Switch White LED Backlit for Mac Windows-Version 2
Item #: 234511434

Keychron K3 Ultra-Slim 75% ISO-UK-Layout Wireless Bluetooth/Wired USB Mechanical Keyboard,84 Keys Hot Swappable Low-Profile Optical Brown Switch

Item #: 234511434
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Be ready to multitask without missing a beat by connecting the K3 with up to 3 devices via stable Bluetooth 5.1 and switch between your laptop, PC, tablet, and phone seamlessly.
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What Stands Out

Ultra-Slim Design
The Keychron K3's ultra-slim profile enhances portability, making it ideal for on-the-go professionals and students who value space-saving tech without compromising performance.
Hot-Swappable Switches
With hot-swappable optical switches, users can easily customize their typing experience, allowing for quick changes to suit personal preferences and enhance overall productivity.
Dual Connectivity
Support for both Bluetooth and wired USB connections provides flexibility, enabling seamless transitions between devices for a hassle-free user experience across various platforms.

Product Details

Shop Keychron K3 Ultra-Slim 75% ISO-UK-Layout Wireless Bluetooth/Wired USB Mechanical Keyboard,84 Keys Hot Swappable Low-Profile Optical Brown Switch White LED Backlit for Mac Windows-Version 2 online at a best price in USA. B09K3Z51KP
Compatible DevicesSmartphone
Connectivity TechnologyBluetooth, USB
Product FeaturesLightweight,Wireless,Travel
Keyboard Backlighting Color SupportSingle Color
Number of Batteries1
Switch TypeMechanical with Optical Switch
Keyboard LayoutQWERTY
Hand OrientationAmbidextrous
Button Quantity84
Compatible Operating System FamilyMacOS, Windows
Number of Keys84
ColourBrown Swich
Style NameModern
ThemeMechanical Keyboards, Wireless Keyboards
Brand NameKeychron
Keyboard DescriptionMechanical
Antenna LocationStudent
Box ContentsExtra keycaps
Model NumberK3
Model NameKeychron K3 UltraSlim
Unit Count1.0 count
ManufacturerKeychron
Number of Packs1
Country of OriginChina
Item Dimensions L x W x H30.6L x 11.6W x 2.2H centimetres
Enclosure MaterialAluminium
BrandKeychron
Recommended uses for productStudent
Special featureLightweight,Wireless,Travel
Keyboard backlighting colour supportSingle Color
StyleModern
Product dimensions30.6L x 11.6W x 2.2H centimetres

Who Should Buy?

Suitable For
  • Compact Workspaces

    Ideal for users with limited desk space, allowing full functionality without the bulk of a traditional keyboard.

  • Travel Enthusiasts

    Lightweight design and wireless capability make it easy to transport for use on the go.

  • Writers & Coders

    Low-profile optical switches provide a comfortable typing experience, enhancing productivity for prolonged use.

Not Suitable For
  • Gaming Enthusiasts

    May lack the tactile feedback and speed required for competitive gaming despite its mechanical features.

Product Description

Have any Query? Chat with us

Customer Questions & Answers

  • Question: Can the K3 be used with both Mac and Windows operating systems?

    Answer: Yes, it has a unique Mac layout with necessary Mac multimedia keys and extra keycaps for both Windows and Mac OS.
  • Question: Can the low-profile optical switches be hot-swapped without soldering?

    Answer: Yes, it's possible to easily hot-swap every low-profile optical switch without the need for soldering.
  • Question: What are the connectivity options for the K3?

    Answer: The K3 can be connected via stable Bluetooth 5.1 chipset with up to 3 devices, and it also has a wired mode with USB Type-C connection.

Keychron Keyboards K3 Editorial Review

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The Keychron K3 Ultra-Slim Mechanical Keyboard has garnered a mix of praise and frustration among users, ultimately reflecting a balanced yet nuanced customer experience. Many users appreciate the lightweight design, solid build quality, and versatile connectivity options that this keyboard offers. For programmers and creatives, the tactile feedback of the optical switches—especially the brown switches preferred by some—provides an engaging typing experience that is responsive and enjoyable. Notably, the aesthetic appeal, customizable backlighting, and ability to switch between Mac and Windows layouts have also been highlighted as significant positives. However, the keyboard is not without its flaws. Several users have reported significant issues with Bluetooth connectivity, including delayed recognition and random disconnections. These technical glitches seem to overshadow many of the keyboard’s appealing features for those who rely on wireless functionality. Furthermore, some feedback pointed to recurring issues like key malfunctions, such as stutters or keys getting stuck, raising concerns about long-term durability and reliability. Users also indicated difficulties in finding compatible low-profile keycaps, although the inclusion of additional Mac and Windows keycaps was welcomed. Despite these challenges, the Keychron K3 maintains a devoted following among those looking for a stylish, high-performance mechanical keyboard, especially for users transitioning from laptops. It offers an intriguing blend of aesthetics and functionality, making it a noteworthy option, albeit with some caveats regarding its Bluetooth capabilities. **

Customer Reviews & Ratings

108 customers ratings
  • 5 Star
    58%
  • 4 Star
    19%
  • 3 Star
    8%
  • 2 Star
    5%
  • 1 Star
    10%

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Pros

  • Lightweight and slim design, ideal for portability
  • Excellent tactile feedback from low-profile optical switches
  • Solid build quality and appealing aesthetics
  • Customizable RGB backlighting with different modes
  • Comes with keycaps for both Mac and Windows, along with a dust protector

Cons

  • Reports of keys getting stuck or having a "phantom keystroke" problem

Platform Trust & Buyer Confidence

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Jasmin
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“Great products and very good service: very easy and very fast international delivery.”

9 September 2026 · via Trustpilot
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10 September 2026 · via Trustpilot
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“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”

11 September 2026 · via Trustpilot
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Adele
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“Easy to find and order what you want on the website. Delivery is quick to the UK”

8 September 2026 · via Trustpilot
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Features & Benefits

  • Compact 75% layout 84 keys hot-swappable ultra-slim wireless mechanical keyboard
  • Stable Bluetooth 5.1 chipset for seamless connection with up to 3 devices
  • Mac layout with necessary Mac multimedia keys, also compatible with Windows
  • Low-profile Keychron optical switch for faster input and tactile responsiveness
  • Reinforced aluminum body making it one of the thinnest and lightweight mechanical keyboards
  • Hot-swap every low-profile optical switch without soldering for customized typing experience

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