Keychron J4 QMK Wireless Mechanical Keyboard (US ANSI Layout)
Keychron J4 QMK Wireless Mechanical Keyboard (US ANSI Layout) - Black - RGB Backlight / Keychron Super Switch (Hot-Swappable) / Red Switch is backordered and will ship as soon as it is back in stock.
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Keychron J4 is a wireless custom mechanical keyboard. It supports 2.4 GHz, Bluetooth, and a wired connection. It allows anyone to master any keys or macro commands on its 80% TKL layout through Keychron Launcher web app. Besides, users can hot-swap with Keychron Super mechanical switch in a breeze (hot-swappable version only).
No discount code can be used for the J4.
Please drop your email on "Notify Me When Available" if the product model is out of stock.
Keychron J4
The J4 is a wireless mechanical keyboard with a TKL (80%) layout. It supports 2.4 GHz, Bluetooth, and wired connections. Configurable through QMK and Keychron Launcher web app, it offers endless possibilities and enhanced productivity in your work and gaming!
The J4 features a superior sound and typing experience with multiple layers of acoustic foams, such as IXPE, PET, and EPDM.
2.4 GHz & Bluetooth Connection
Experience peak gaming performance on the fly with the 2.4 GHz wireless connection boasting a rapid 1000 Hz polling rate. For seamless multitasking across your computer, phone, and tablet, you can effortlessly connect the J4 via Bluetooth 5.2 to three devices.
Program with QMK & Launcher.
The open-source QMK firmware means endless possibilities for key remapping, macros, shortcuts, and more. Now you can easily customize each key with the Keychron Launcher web app.
Click here to use Lemokey Launcher* Please use the latest version of Chrome / Opera / Edge browser to open the Launcher and connect the keyboard to your device via wired mode.
Advanced Acoustic Foam
Elevate your typing with J4 featuring advanced IXPE acoustic foam for enhanced comfort, coupled with resilient EPDM foam for superior key switch support, responsiveness, and durability. The steel plate provide responsive feedback and a peaceful typing sound, while added weight will enhance the stability.
Last Key Priority (LKP)
LKP allows seamless directional changes by prioritizing the last key pressed, ensuring smoother gameplay in titles like Valorant. This helps reduces the delay between key presses, giving a competitive edge by allowing for quicker changes in direction without waiting for previous keys to be fully released.
Plug-and-Play Receiver
For a better 2.4 GHz wireless experience, the J5 comes with a Type-A receiver. Enjoy the quick plug-and-play time. Or, put it away in the keyboard storage slot at the bottom.
An Epic Core Inside
A powerful ARM architecture MCU equipped with 256KB Flash will provide more flexibility for developers. The polling rate is 1000 Hz on 2.4GHz and wired modes right out of the box, which makes the latency hardly noticeable even in competitive games.
Hot-Swappable (Optional)
We also provide a hot-swappable version for your choice, which means you can customize your typing experience without soldering, pop them in and it's done.
Every detail matters for a personalized typing experience, that’s why we give you the power. You can hot-swap every switch on the J4 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 Super Switch
Our exclusive Keychron Super switch adopts a new mold with unparalleled precision. Every switch is tested for pro-grade quality and has a lifespan of up to 50 million clicks, providing great reliability and high performance for long typing sessions. Its new light affection structure on its transparent top housing also ensure high light transmittance and a more consistent, brighter backlight effect.
Double-shot PBT Keycaps
The double-shot PBT keycaps of the J4 provide excellent oil resistance and prevent the legends from fading out. Additionally, the keyboard offers two different keycap options to meet varying preferences and needs.
Cherry profile (shine-through)
MDA profile (non-shine-through)
Unlock Dynamic Backlit Control
omes with more than 22 types of RGB backlight settings (as well as a static white backlight option). You can further fine-tune the RGB hue, saturation, brightness, effect speed with ease. The J1 features Per-Key RGB, letting you customize the color of each key individually with full control. It also supports Mix RGB, allowing you to divide the keyboard into two lighting zones, each with its own effects, colors, and timelines for dynamic, layered visuals.
Per-key RGB
Per-key RGB allows you to set the color of each key individually. You can change the color of the key by selecting it, clicking on the area where the color is set, changing the color, and saving it.
Mix RGB
With Mix RGB, you can split your keyboard into two custom lighting zones, each with its own effects. Add dynamic loops with different colors and animations for every time period.
Ergonomic Support
Two levels of adjustable typing angle (4.5º & 9.6º) and curved Cherry profile and MDA profile keycaps are all working together to provide long-lasting ergonomic support for your wrist.
What's in the box?
Frequently bought together (Add-on)
Please select the matching variant for your product.
SPECIFICATION
Number of Keys: 87 (80%)
Switches: Mechanical
Switch Face: North-facing
Number of Multimedia Keys: 12 Frame Material: ABS
Keycap Material: Double-shot PBT
Keycap Profile: Cherry Profile / MDA Profile
Layout: ANSI
Polling Rate (2.4GHz and Wired Mode): 1000Hz
Polling Rate (BT Mode): 125Hz
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: 3750 mAh rechargeable li-polymer battery
Wireless Working Time (Backlit off): Around 288 hours (Lab test result may vary by actual use)
Wireless Working Time (RGB): Around 156 hours
Connection: 2.4 GHz / Bluetooth / Type-C wired
Bluetooth version: 5.2
Bluetooth Device Name: Keychron J4
Compatible System: Windows / Linux / macOS
PHYSICAL UNIT
Dimension: 365.72 x 137.71mm (14.40 x 5.42")
Weight: 870 g / 1.92 lbs
Height incl. keycap (front): 28.18 mm (1.11")
Height incl. keycap (rear): 37.81 mm (1.49")
Typing Angle: 4.5º and 9.6º
MCU: WB32F3G71RCT6 (256KB Flash)
Operating Environment: -10 to 50℃
Learn more about the Keychron J4, such as the shortcuts, Launcher web app tutorial, factory reset, and more in the FAQ section.
