Not sure which keyboard to choose? Try the Keyboard Finder now!

Head to head · Prices checked Nov 7, 2026

Jamesdonkey RS2 4.0 vs MIIIW Xiaomi Z830

Get the Jamesdonkey RS2 4.0 for knob.

KeebFinder may earn a commission when you buy through these links, at no extra cost to you.

Quick verdict

Which one should you get?

Get the

Jamesdonkey RS2 4.0

Knob

Build quality in the top 40% of 96% boards under $100.

Rules this board out

  • Compact full-size layout. The numpad is present, the gaps of a full-size board are not.

Get the

MIIIW Xiaomi Z830

Build quality in the bottom 15% of 75% boards under $150.

Rules this board out

  • No numpad.

What actually differs

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 RS2 4.0

MIIIW Xiaomi Z830

  • Layout size

    96%

    75%

  • Case material

    Aluminum

    ABS

  • Switch options

    Linear

    Linear, Tactile

  • Knob

    Yes

    No

  • Weight

    1,150 g

    788 g

    Heavier boards stay planted and lighter ones travel

KeebFinder scores

How we score
  • Jamesdonkey RS2 4.0
  • MIIIW Xiaomi Z830
Performance
58
66
Build quality
71
49
Productivity
93
67
Customizability
82
64
Portability
53
83

What they share

  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Battery: 4,000 mAh
  • Keycaps: PBT
See every spec side by side

Full specs

Jamesdonkey RS2 4.0 vs MIIIW Xiaomi Z830 specs

Every tracked spec, side by side. Rows marked with a dot differ between the boards.

10 of 21 specs differ

Jamesdonkey RS2 4.0

MIIIW Xiaomi Z830

Typing & switches

Switch options

Linear
Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
—

Sound dampening

Yes
No

Layout

Layout size

96%
75%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

Yes
No

Display

None
None

Media keys

Yes
No

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired
Bluetooth, 2.4 GHz, Wired

Battery

4,000 mAh
4,000 mAh

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
ABS

Keycaps

PBT
PBT

Weight

1,150 g
788 g

Dimensions

34 x 405 x 138 mm
40 x 152 x 337 mm

Backlight

RGB
RGB

Firmware & software

QMK

Yes
No

Mac & Windows

Yes
Yes

Extras

Released

2024
2023

Where to buy

Compare prices

Live prices from the stores we track, cheapest in-stock offer first.

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.

Lowest price across stores, Amazon excluded.

Still torn?

Answer a few quick questions and the keyboard finder ranks 2,000+ boards by how you will actually use yours.