Jamesdonkey R4 vs Keychron J12 HE
Get the Jamesdonkey R4 for knob. Get the Keychron J12 HE for hall effect and rapid trigger.
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.
Jamesdonkey R4
Keychron J12 HE
Hall effect (magnetic)
No
Yes
Rapid trigger
No
Yes
Case material
Aluminum
Plastic
Knob
Yes
No
Weight
1,900 g
952 g
- Jamesdonkey R4
- Keychron J12 HE
- Performance
- 5588
- Build quality
- 6776
- Productivity
- 6389
- Customizability
- 7986
- Portability
- 7780
- Layout size: 75%
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Mount style: Gasket Mount
- QMK
- Keycaps: PBT
Jamesdonkey R4 vs Keychron J12 HE specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
12 of 25 specs differ
Jamesdonkey R4
Keychron J12 HE
Switch options
Hall effect (magnetic)
Rapid trigger
Hot-swappable
Mount style
Sound dampening
Layout size
Layout standard
Ergonomics
Knob
Display
Media keys
Connection
Max polling rate
Battery
USB-C
Case material
Keycaps
Weight
Dimensions
Backlight
QMK
VIA
Mac & Windows
Released
Compare prices
Live prices from the stores we track, cheapest in-stock offer first.
Lowest price across stores, Amazon excluded.
Prices in USD are converted to your currency and can change at any time. KeebFinder may earn a commission when you buy through these links, at no extra cost to you.
Not sold on either?
![[In Stock] Dolphins75 75% Mechanical Keyboard](https://cdn.shopify.com/s/files/1/0549/0262/0278/products/7ce4f9b819d9d19cecd21e99770e30b1.jpg?v=1702526832&width=3840&quality=75)
Still torn?
Answer a few quick questions and the keyboard finder ranks 2,000+ boards by how you will actually use yours.