Keychron J2 HE vs Lemokey X4
Get the Keychron J2 HE for hall effect and the 8,000 Hz polling rate. Get the Keychron Lemokey X4 for knob.
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Which one should you get?
Get the
Keychron J2 HE
Hall effect
Build quality in the top 10% of 75% boards under $100.
- Magnetic switches only. Standard MX switches will not fit.
- North-facing LEDs. Cherry-profile keycaps can hit the switch housing.
Get the
Keychron Lemokey X4
Knob
Build quality in the top 10% of 75% boards under $50.
- North-facing LEDs. Cherry-profile keycaps can hit the switch housing.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
The differences that matter
Skip the 40-row spec sheet. These are the specs that change how each board feels, sounds, and fits your desk.
Keychron J2 HE
Keychron Lemokey X4
Hall effect (magnetic)
Yes
No
Adjustable actuation helps in games and not in normal typing
Max polling rate
8,000 Hz
1,000 Hz
Higher polling helps competitive FPS and does nothing for typing
Case material
Plastic
ABS, Plastic
Knob
No
Yes
Weight
780 g
712 g
Heavier boards stay planted and lighter ones travel
- Keychron J2 HE
- Keychron Lemokey X4
- Performance
- 8974
- Build quality
- 8382
- Productivity
- 8796
- Customizability
- 8982
- Portability
- 6165
- Layout size: 75%
- Connection: Wired
- Hot-swappable
- Switch options: Clicky, Linear, Tactile
- Mount style: Gasket Mount
- QMK
Keychron J2 HE vs Lemokey X4 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
15 of 27 specs differ
Keychron J2 HE
Keychron Lemokey X4
Switch options
Hall effect (magnetic)
Hot-swappable
Mount style
Sound dampening
Screw-in stabilizers
Layout size
Layout standard
Ergonomics
Knob
Display
Media keys
Connection
Max polling rate
USB-C
Case material
Plate material
Keycaps
Weight
Dimensions
Typing angle
Backlight
QMK
VIA
N-key rollover
Mac & Windows
Released
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