Keychron
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Keychron KJ4 Wireless Mechanical Keyboard - 80% Layout(87 Keys) Red Switch, QMK RGB Backlit, 2.4G/Bluetooth/USB-C, Double-Shot Cherry PBT Keycaps, 3750mAh Battery, Mac/Win/Linux Compatible - Black
Keychron KJ4 Wireless Mechanical Keyboard - 80% Layout(87 Keys) Red Switch, QMK RGB Backlit, 2.4G/Bluetooth/USB-C, Double-Shot Cherry PBT Keycaps, 3750mAh Battery, Mac/Win/Linux Compatible - Black
Keychron KJ4 Wireless Mechanical Keyboard - 80% Layout(87 Keys) Red Switch, QMK RGB Backlit, 2.4G/Bluetooth/USB-C, Double-Shot Cherry PBT Keycaps, 3750mAh Battery, Mac/Win/Linux Compatible - Black
Keychron KJ4 Wireless Mechanical Keyboard - 80% Layout(87 Keys) Red Switch, QMK RGB Backlit, 2.4G/Bluetooth/USB-C, Double-Shot Cherry PBT Keycaps, 3750mAh Battery, Mac/Win/Linux Compatible - Black
Keychron KJ4 Wireless Mechanical Keyboard - 80% Layout(87 Keys) Red Switch, QMK RGB Backlit, 2.4G/Bluetooth/USB-C, Double-Shot Cherry PBT Keycaps, 3750mAh Battery, Mac/Win/Linux Compatible - Black
Keychron KJ4 Wireless Mechanical Keyboard - 80% Layout(87 Keys) Red Switch, QMK RGB Backlit, 2.4G/Bluetooth/USB-C, Double-Shot Cherry PBT Keycaps, 3750mAh Battery, Mac/Win/Linux Compatible - Black
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Keychron KJ4 Wireless Mechanical Keyboard - 80% Layout(87 Keys) Red Switch, QMK RGB Backlit, 2.4G/Bluetooth/USB-C, Double-Shot Cherry PBT Keycaps, 3750mAh Battery, Mac/Win/Linux Compatible - Black
Keychron KJ4 Wireless Mechanical Keyboard - 80% Layout(87 Keys) Red Switch, QMK RGB Backlit, 2.4G/Bluetooth/USB-C, Double-Shot Cherry PBT Keycaps, 3750mAh Battery, Mac/Win/Linux Compatible - Black
Keychron KJ4 Wireless Mechanical Keyboard - 80% Layout(87 Keys) Red Switch, QMK RGB Backlit, 2.4G/Bluetooth/USB-C, Double-Shot Cherry PBT Keycaps, 3750mAh Battery, Mac/Win/Linux Compatible - Black
Keychron KJ4 Wireless Mechanical Keyboard - 80% Layout(87 Keys) Red Switch, QMK RGB Backlit, 2.4G/Bluetooth/USB-C, Double-Shot Cherry PBT Keycaps, 3750mAh Battery, Mac/Win/Linux Compatible - Black
Keychron KJ4 Wireless Mechanical Keyboard - 80% Layout(87 Keys) Red Switch, QMK RGB Backlit, 2.4G/Bluetooth/USB-C, Double-Shot Cherry PBT Keycaps, 3750mAh Battery, Mac/Win/Linux Compatible - Black
Keychron KJ4 Wireless Mechanical Keyboard - 80% Layout(87 Keys) Red Switch, QMK RGB Backlit, 2.4G/Bluetooth/USB-C, Double-Shot Cherry PBT Keycaps, 3750mAh Battery, Mac/Win/Linux Compatible - Black
Keychron KJ4 Wireless Mechanical Keyboard - 80% Layout(87 Keys) Red Switch, QMK RGB Backlit, 2.4G/Bluetooth/USB-C, Double-Shot Cherry PBT Keycaps, 3750mAh Battery, Mac/Win/Linux Compatible - Black
The KJ4 is designed for versatility and comfort across macOS, Windows, and Linux.
Keychron KJ4 Wireless Mechanical Keyboard - 80% Layout(87 Keys) Red Switch, QMK RGB Backlit, 2.4G/Bluetooth/USB-C, Double-Shot Cherry PBT Keycaps, 3750mAh Battery, Mac/Win/Linux Compatible - Black
Item #: 220006403

Keychron KJ4 Wireless Mechanical Keyboard - 80% Layout(87 Keys) Red Switch, QMK RGB Backlit, 2.4G/Bluetooth/USB-C, Double-Shot Cherry PBT Keycaps,

Item #: 220006403

€ 66

Price Details

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*All items will import from US

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The KJ4 is designed for versatility and comfort across macOS, Windows, and Linux.
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What Stands Out

Versatile Connectivity
Connect effortlessly via Bluetooth, USB-C, or 2.4G wireless. This flexibility ensures seamless use across devices, enhancing productivity whether at home, office, or on the go.
Durable Keycaps
Crafted with double-shot Cherry PBT keycaps, this keyboard resists wear and tear. Enjoy a premium feel and enhanced typing experience, ensuring longevity while maintaining vibrant key legends.
Customizable Lighting
The QMK RGB backlit feature allows extensive customization of color schemes. Personalize your keyboard to fit your style, boosting both aesthetics and functionality, particularly in low-light environments.

Product Details

Shop Keychron KJ4 Wireless Mechanical Keyboard - 80% Layout(87 Keys) Red Switch, QMK RGB Backlit, 2.4G/Bluetooth/USB-C, Double-Shot Cherry PBT Keycaps, 3750mAh Battery, Mac/Win/Linux Compatible - Black online at a best price in Malta. B0FMF2N1LK
  • 2.4G, Bluetooth 5.2, and Wired Modes: Switch seamlessly between three connection modes. Connect up to three devices via Bluetooth 5.2, or use the 2.4 GHz wireless or Type-C wired modes for stable, high-speed performance across setups
  • QMK/VIA Advanced Programming & Browser-Based Launcher: Reprogram every key via QMK/VIA firmware and build macros through the browser-based Launcher—no downloads, no OS restrictions. Save profiles to onboard memory on Windows, macOS, Linux
  • Default Windows, User-Remapped macOS Layout: The KJ4 comes with a Windows layout and two blank layers. macOS users can manually remap keys and assign one layer to a Mac layout via the Launcher app for full macOS compatibility
  • Doubleshot PBT Shine-Through Keycaps: Thick 1.5mm PBT keycaps resist oil and shine, while translucent doubleshot molding amplifies 16.8M-color RGB effects (8 preset modes + custom gradients). Perfect for gaming setups and design studios
  • TKL Layout of 87 Keys, Compact Efficiency: Designed with a Tenkeyless layout, the KJ4 features 87 keys that strike the perfect balance between compact form and full functionality. Ideal for users who want more desk space without sacrificing essential keys
Compatible DevicesPC, Mac, Linux
Connectivity Technology2.4G, Bluetooth, USB-C
Additional FeaturesProgrammable Keys
Power SourceUSB power
Switch TypeLinear
Keyboard LayoutQWERTY
Hand OrientationAmbidextrous
Compatible Operating System FamilyLinux, Windows
Compatible Tablet Computer ModelsAAUB P30
Number of Keys87
Enclosure MaterialPolybutylene Terephthalate
BrandKeychron
Keyboard DescriptionMechanical
Antenna LocationGaming, Office
Unit Count1.0 Count
ManufacturerKeychron
Style NameBlack - Red Switch
Recommended Uses For ProductGaming, Office
Special FeatureProgrammable Keys
StyleBlack - Red Switch
MaterialPolybutylene Terephthalate
Item Weight3.6 lbs (1.63 kg)

Dangerous Goods

To avoid the delay in customs clearance process for Dangerous Goods, the shipment shall be opened at our warehouse facility to check the severity of hazardous components. Please see the list of Dangerous goods here.

Who Should Buy?

Suitable For
  • Gamers

    The responsive red switches and customizable RGB backlighting enhance gaming performance and experience.

  • Writers

    Comfortable typing with PBT keycaps and responsive keys allows writers to enjoy long typing sessions without strain.

  • Multi-Device Users

    Seamlessly switch between devices with Bluetooth and USB-C connectivity, ideal for users with multiple computing devices.

Not Suitable For
  • Budget Shoppers

    With premium features, the Keychron KJ4 may not fit the budget constraints of casual or entry-level users.

  • Compact Keyboard Lovers

    Those who prefer smaller keyboards might find the 80% layout too bulky for their limited desk space.

  • Traditional Users

    Users accustomed to non-mechanical keyboards may find the tactile feedback of mechanical switches uncomfortable.

Product Description

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What are the key features of the Keychron KJ4 Wireless Mechanical Keyboard?

    Answer: The Keychron KJ4 is a versatile wireless mechanical keyboard featuring an 80% layout with 87 keys and Brown switches, balancing tactile feedback and quiet operation. It supports QMK firmware for customizable key mappings, RGB backlighting for enhanced aesthetics, and connectivity options via Bluetooth, USB-C, or 2.4GHz. The double-shot Cherry PBT keycaps ensure durability and a premium feel, making it ideal for both gaming and typing. This combination of features makes the KJ4 suitable for professionals and gamers who want efficiency and style.
  • Question: How does the Keychron KJ4 connect to devices?

    Answer: The Keychron KJ4 offers flexible connectivity options, allowing users to connect via Bluetooth, USB-C, or a 2.4GHz wireless connection. This enables seamless pairing with multiple devices such as laptops, desktops, tablets, and smartphones. For instance, you can easily switch between your desktop computer and tablet without the hassle of disconnecting and connecting wires. This convenience is particularly useful for users who multitask across different platforms.
  • Question: What is the significance of the QMK firmware in this keyboard?

    Answer: The QMK (Quantum Mechanical Keyboard) firmware supports advanced customization features for the Keychron KJ4. Users can remap keys, create macros, and personalize lighting settings through an intuitive interface. This functionality allows for better workflows, especially for programmers and gamers who require specific commands at their fingertips. With QMK, you can tailor the keyboard experience to fit unique user preferences, enhancing productivity and gameplay.
  • Question: What are Brown switches and how do they perform?

    Answer: Brown switches are a type of mechanical switch known for their tactile feedback and moderate actuation force. This feature provides a satisfying bump without the loud click associated with other switches, making them suitable for both typing and gaming. Users often appreciate Brown switches for offering a compromise between noise and performance, letting you enjoy a quieter work environment while still receiving clear feedback. This makes the Keychron KJ4 ideal for office settings and gaming sessions alike.
  • Question: Can the Keychron KJ4's RGB lighting be customized?

    Answer: Yes, the RGB backlighting on the Keychron KJ4 can be fully customized. Users can choose from various lighting effects, colors, and brightness levels via the software or keyboard shortcuts. This level of customization allows you to match the lighting scheme of your setup or create dynamic lighting patterns for gaming. Whether you prefer subtle illumination for a workspace or vibrant effects for a gaming environment, the KJ4 offers flexibility to suit your aesthetic preferences.
  • Question: Is the Keychron KJ4 suitable for gaming?

    Answer: Absolutely! The Keychron KJ4 is quite popular among gamers due to its responsive Brown switches, compact design, and wireless connectivity options. The low latency of wireless connections, especially with the 2.4GHz option, means that you won’t experience lag during intense gaming sessions. Additionally, the customizable RGB lighting enhances the gaming atmosphere, allowing for visually striking setups that match your gaming style.
  • Question: What is the benefit of using Double-Shot Cherry PBT keycaps?

    Answer: Double-shot Cherry PBT keycaps are known for their durability and resistance to wear, fading, and shine. They ensure that legends or symbols on the keys remain clear and intact over time, making the Keychron KJ4 a long-lasting investment. Moreover, the PBT material provides a more premium feel compared to ABS plastic, enhancing the overall typing experience. Users who value aesthetics and tactile quality will appreciate the comfort and longevity these keycaps offer.
  • Question: How portable is the Keychron KJ4?

    Answer: The Keychron KJ4’s compact 80% layout makes it highly portable, easily fitting into most backpacks or laptop bags. This lightweight design, combined with its wireless capabilities, allows users to take it on the go without being tethered to a desk. Whether you’re a remote worker, a student, or a frequent traveler, you can enjoy a high-quality typing experience anywhere. This portability is essential for maintaining productivity outside a traditional workspace.
  • Question: Does the Keychron KJ4 support multiple devices?

    Answer: Yes, the Keychron KJ4 can connect to multiple devices, making it a versatile tool for users with different devices. You can easily switch between connected devices through a simple key combination, allowing seamless transitions from typing on a laptop to a tablet. This feature is immensely helpful for professionals and students who use various devices for different tasks, ensuring you maintain efficiency without needing multiple keyboards.
  • Question: Where can I buy the Keychron KJ4 Wireless Mechanical Keyboard?

    Answer: You can purchase the Keychron KJ4 Wireless Mechanical Keyboard from Ubuy in Malta. Ubuy offers a comprehensive selection of Keychron products, ensuring you have access to the keyboard along with any accessories you might need. Shopping on Ubuy means you can take advantage of their various customer service options and detailed product information, making your buying experience smooth and informative.

Keychron Keyboards Editorial Review

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Customer Reviews & Ratings

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“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”

12 June 2026 · via Trustpilot
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Important information

  • Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
  • Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.

€ 66

Order now and get it around Sunday, July 19

QTY:

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PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.

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Fastest cross-border delivery

Features & Benefits

  • Versatile compatibility with macOS, Windows, and Linux.
  • Seamless multitasking with Bluetooth 5.2 connectivity for up to three devices.
  • High-performance input with 2.4 GHz wireless and USB Type-C wired modes.
  • Easy key remapping and macro creation through the Keychron Launcher web app.
  • Durable Super switches tested for up to 50 million keystrokes.
  • Customizable RGB lighting with 22 settings and user-friendly controls.

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