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Head to head · Prices checked Oct 28, 2026

Epomaker TH33 vs MMD KM21 Ultra

Get the Epomaker TH33 for the 2,000 mAh battery. Get the MMD KM21 Ultra for qmk.

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Quick verdict

Which one should you get?

Get the

Epomaker TH33

Battery

Build quality in the top 20% of Numpad boards under $50.

Rules this board out

  • South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
$49 at Epomaker

Get the

MMD KM21 Ultra

QMK

Build quality in the top 15% of Numpad boards under $100.

$89 at MonacoKeys

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.

Epomaker TH33

MMD KM21 Ultra

  • Battery

    2,000 mAh

    980 mAh

    A larger battery means fewer cables during the day

  • Case material

    ABS

    Aluminum

  • Mount style

    Gasket Mount

    Top Mount

  • QMK

    No

    Yes

    The deep option when you want to remap every key

  • Plate material

    Polycarbonate

    Plastic

KeebFinder scores

How we score
  • Epomaker TH33
  • MMD KM21 Ultra
Performance
78
67
Build quality
77
82
Productivity
88
89
Customizability
83
89
Portability
90
86

What they share

  • Layout size: Numpad
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Knob
  • VIA
  • Sound dampening
See every spec side by side

Full specs

Epomaker TH33 vs MMD KM21 Ultra specs

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

8 of 25 specs differ

Epomaker TH33

MMD KM21 Ultra

Typing & switches

Switch options

Linear
—

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Top Mount

Sound dampening

Yes
Yes

Layout

Layout size

Numpad
Numpad

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

Yes
Yes

Display

None
None

Connectivity & battery

Connection

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

Max polling rate

1,000 Hz
—

Battery

2,000 mAhBetter
980 mAh

USB-C

Yes
Yes

Build & materials

Case material

ABS
Aluminum

Plate material

Polycarbonate
Plastic

Keycaps

PBT
—

Weight

380 g
—

Dimensions

45 x 151 x 141 mm
—

Typing angle

6°
—

Backlight

RGB, south-facing
RGB

Firmware & software

QMK

No
Yes

VIA

Yes
Yes

N-key rollover

Yes
No

Mac & Windows

Yes
Yes

Extras

Released

2025
2026

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.

Epomaker TH332 stores
MMD KM21 Ultra2 stores

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