Keychron J4 HE Wireless Magnetic Switch Keyboard

A magnetic switch lets you decide how far a key travels before it fires, and it resets the instant you start lifting your finger — no fixed click point to wait on. Put that on a tenkeyless board and you get faster inputs plus a clear half-desk for low-sensitivity mouse sweeps.

Why this board

• ▸You get your mouse arm back. The 80% tenkeyless layout drops the number pad but keeps the full F1–F12 row, a real arrow cluster, and the Insert/Home/Page block — 87 keys plus a knob, in the form factor competitive FPS players have used for years.
• ▸Actuation adjusts from 0.2mm to 3.3mm, in 0.1mm steps. Set a hair trigger on your movement keys and a deeper, deliberate press everywhere else, so you stop fat-fingering the keys you only mean to tap on purpose.
• ▸Dynamic Rapid Trigger is built in. The key registers a release the moment it starts travelling back up instead of waiting to clear a fixed reset point — the difference between a clean counter-strafe and one that arrives a beat late.
• ▸Not locked to one machine or one cable. Tri-mode connectivity covers Bluetooth5.2 (three device slots, on keys 1, 2 and 3), a dedicated 2.4GHz slot on key 4 at a 1000Hz polling rate, and plain USB-C wired.
• ▸Configured in a browser tab, with nothing to install. Keychron Launcher handles keymapping, RGB and per-key actuation, plus HE-specific tools: Rapid Trigger, SOCD, Gamepad Analog, One Key Multiple Commands, Long-Press Switch, actuation Curve, Calibration and a key tester.
• ▸The knob is genuinely useful, not decoration. Rotate for volume up and down; hold Fn and rotate to ride the RGB brightness. Mac and Windows are both native — Fn+CapsLock flips between them.

SpecificationsKeychron J4 HE — SKU J4H-H1Layout80% tenkeyless (TKL), ANSI — 87 keys plus knobSwitchesKeychron Ultra-Fast Lime linear magnetic (Hall effect), hot-swappableSensingTMR sensors, contactless magneticSound dampeningSound-absorbing foamAdjustable actuation0.2mm – 3.3mm, 0.1mm sensitivityRapid TriggerYes — Dynamic Rapid TriggerConnectivityBluetooth 5.2, 2.4GHz wireless, USB-C wiredPolling rate1000Hz over 2.4GHzBacklightRGB — per-key RGB and Mix RGB, 22+ light effectsKnobVolume up / down; Fn + rotate for RGB brightnessSoftwareKeychron Launcher, browser-based — no installOperating systemsWindows, macOS and Linux — toggle with Fn + Caps LockOnboard storageYes — settings travel with the keyboardColourBlack, with yellow Esc keycap and yellow legendsWhat's in the box

• ▸One Keychron J4 HE Wireless Magnetic Switch Keyboard, SKU J4H-H1, fully assembled
• ▸An additional set of customised keycaps for both Windows and macOS — stated on the retail packaging
• ▸The sealed Keychron retail box, exactly as it was packed at the factory

▸Brand new and factory sealed. Never opened, never used, never plugged in. The photos show the front and back of the actual retail box you will receive.

▸Free shipping from Michigan, USA.

▸Ships within 2 business days of cleared payment.

▸Returns are not accepted on this listing. Because the box arrives sealed, you are getting it in exactly the condition it left the factory in. Please ask any question you have before you buy — I would much rather answer it first.