Keychron K4 Pro QMK/VIA Wireless Mechanical Keyboard

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Keychron

K4 Pro

A 96% layout QMK/VIA wireless custom mechanical keyboard 

Keychron K4 Pro QMK/VIA Wireless Mechanical Keyboard Fully assembled or Barebone version

Wireless and Wired

An excellent solution for multitasking. You can connect the K4 Pro with up to 3 devices wirelessly via its stable Broadcom Bluetooth 5.1 for seamless multitasking across your laptop, phone, and tablet. Switch among them swiftly, and it’s fully compatible with both Mac and Windows.

A reliable USB Type-C wired connection is also available when you need it.

Keychron K4 Pro QMK/VIA Wireless and Wired Mechanical Keyboard on the desk
QMK on Keychron K8 Pro
VIA on  on Keychron K8 Pro

Program with QMK & VIA.

QMK/VIA means endless possibilities for a fluid workflow. 
Simply connect the K4 Pro to your device with a cable, drag and drop your favorite keys or macro commands to remap any key you want on any system (macOS, Windows, or Linux). 


Check out the video above demonstrating how to remap the Light Effect key (located on the K4 Pro’s top right corner) to an Eject key with the VIA software, so you can get a shortcut to put your Mac to sleep (Command-Option-Eject), or even remap the fn key in a breeze. It’s never been so intuitive and flexible to personalize your own keymap.


An ultra-low-power ARM Cortex-M4 32-bit STM32L432 MCU which is powerful, and equipped with 128K Flash will provide more flexibility for developers.

Get the keymap working on VIA

Since the VIA code for the K4 Pro is still awaiting approval from Github, it is not yet automatically recognized, so you will need to manually download and import the K4 Pro keymap.

Please download the keymap JSON file below. Connect your keyboard and device with the provided cable, and toggle the switch to cable mode. Open VIA, click on the "Show Design tab" on the "Settings" tab. Drag the JSON file into the “Design” tab on VIA to get the K4 Pro keymap working on VIA.

K4 Pro Keymap JSON Files

Upgraded Typing Experience

The K4 Pro has been re-engineered and redesigned from the inside out to upgrade the typing experience. The added sound-absorbing foam, a thick silicone dampening bottom pad, and steel plate provide responsive feedback and a peaceful typing sound, while added weight will enhance the stability.

Detailed structure of Keychron K4 Pro

Suitable For All Devices

Offers a Mac layout while still being compatible with Windows, the K4 Pro is one of the few on the market that has the same multimedia and function key functions as Apple keyboards for Mac users, but with more tactile feedback.

You can even configure different keymaps for both Mac and Windows devices. While VIA software is compatible with macOS, Windows, and Linux. Includes keycaps for both macOS and Windows (3 keycaps for each) to allow you to switch between operating systems with ease.

Check high-res keycap layout and size here.

Keychron K4 Pro keyboard layout

Hot-swappable

Every detail matters, so we make the K4 Pro hot-swappable for your personalized typing experience. The hot-swappable sockets are mounted on the PCB, so you can hot-swap every switch on the K4 Pro with almost all of the 3pin and 5pin MX style mechanical switches on the market (including Cherry, Gateron, Kailh, Panda, etc.) without soldering. You can customize your own typing experience in seconds.

Keychron K4 Pro hot-swappable feature

The Barebone version (without switch and keycap) is also available at your choice.

Barebone US layout of Keychron K4 Pro QMK VIA wireless mechanical keyboard

Screw-In PCB Stabilizers

Even small part matters for your fingertip feel. We’ve integrated the PCB-mounted screw-in stabilizers for a smoother typing experience with less wobbliness on the big keys such as space bar, shift, enter, and backspace. The Keychron K4 Pro also supports third-party screw-in PCB stabilizers.

Keychron K4 Pro PCB Screw-in stabilizers

Pre-lubed Keychron K Pro Switch

By optimizing the switch mold, the K Pro switch wobbles less than a standard mechanical switch and feels smoother on each hit. Plus, the factory pre-lubed process on all the K Pro switches (exclude the clicky ones), no doubt this will ensure the best smoothness at your fingertips when typing.

Gateron G Pro mechanical switch features

OSA Profile Double-shot PBT Keycaps

To further fine-tune your typing experience, the K4 Pro comes with our unique OSA profile (OEM profile with spherical-angle) and double-shot PBT keycaps that aim to provide a more comfortable fingertip feel with excellent oil resistance for long-term use on the timeless tenkeyless layout.

Keychron K4 Pro OSA Profile Double-shot PBT keycaps

South-facing RGB Lights

The south-facing RGB is designed to better illuminate the keyboard backlight from the typist’s angle. The south-facing RGB is also free from interference when the user installs Cherry-profile alternative keycaps on their keyboard.

Comes with more than 22 types of RGB backlight settings (as well as a static white backlight option), and 14 types of backlight settings on the White Backlight version. You can further fine-tune the RGB hue, saturation, brightness, effect speed with ease.


Ergonomic Support

Three levels of adjustable typing angle (3º, 7º & 10º) and curved OSA-profile keycaps are all working together to provide long-lasting ergonomic support for your wrist.

Keychron K4 Pro ergonomic support with adjustable typing feet and angle

What's in the box?

Keychron K4 Pro package content-fully assembled version

SPECIFICATION

 
Number of Keys: 100 (96%)
Switches  (Not including Barebone Version): Keychron K Pro Mechanical
Switch Face: South-facing
Stabilizers: PCB-mounted screw-in stabilizers
Number of Multimedia Keys: 12 
Frame Material: ABS
Plate Material: Steel
Keycap Material (Not including Barebone Version): Double-shot PBT
Keycap Profile: OSA (OEM profile with spherical-angle)
Layout: ANSI
Polling Rate (Wired Mode): 1000Hz
Polling Rate (Wireless Mode): 90Hz
N-Key Rollover (NKRO): Yes for both wireless and wired modes

CONNECTIVITY AND POWER


Backlit: 22 types of RGB backlight options plus endless possibilities
Battery: 4000 mAh rechargeable li-polymer battery
BT Working Time (Backlit off): Up to 300 hours (Lab test result may vary by actual use)
BT Working Time (RGB): Up to 100 hours (Lowest brightness)
Connection: Bluetooth and Type-C cable
Bluetooth version: 5.1
Bluetooth Device Name: Keychron K4 Pro
Compatible System: macOS/Windows/Linux

PHYSICAL UNIT


Dimension: 390.6 x 139.2 mm (15.38 x 5.48")
Weight: About 1280 g / 2.82 lbs
Height without keycap (front): 24 mm (0.94")
Height without keycap (rear): 31 mm (1.22")
Height incl. keycap (front): 33 mm (1.30")
Height incl. keycap (rear): 40 mm (1.57")
Typing Angle: 3º, 7º and 10º
MCU: Ultra-low-power ARM Cortex-M4 32-bit STM32L432 (128KB Flash)
Operating Environment: -10 to 50℃