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Head to head · Prices checked Oct 21, 2026

Weikav Stars21 Programmable Numpad vs MMD KM21 Ultra

Get the Weikav Stars21 Programmable Numpad for n-key rollover. Get the MMD KM21 Ultra for the 980 mAh battery and knob.

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.

Weikav Stars21 Programmable Numpad

MMD KM21 Ultra

  • Battery

    800 mAh

    980 mAh

  • Mount style

    Gasket Mount

    Top Mount

  • Knob

    No

    Yes

  • Sound dampening

    No

    Yes

  • N-key rollover

    Yes

    No

KeebFinder scores

How we score
  • Weikav Stars21 Programmable Numpad
  • MMD KM21 Ultra
Performance
76
67
Build quality
84
82
Productivity
57
89
Customizability
89
89
Portability
78
86

What they share

  • Layout size: Numpad
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Case material: Aluminum
  • QMK
  • VIA
See every spec side by side

Full specs

Weikav Stars21 Programmable Numpad vs MMD KM21 Ultra specs

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

8 of 23 specs differ

Weikav Stars21 Programmable Numpad

MMD KM21 Ultra

Typing & switches

Switch options

Linear
—

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Top Mount

Sound dampening

No
Yes

Layout

Layout size

Numpad
Numpad

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

No
Yes

Display

None
None

Connectivity & battery

Connection

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

Max polling rate

1,000 Hz
—

Battery

800 mAh
980 mAhBetter

USB-C

No
Yes

Build & materials

Case material

Aluminum
Aluminum

Plate material

—
Plastic

Weight

480 g
—

Dimensions

18 x 130 x 95 mm
—

Backlight

RGB
RGB

Firmware & software

QMK

Yes
Yes

VIA

Yes
Yes

N-key rollover

Yes
No

Mac & Windows

No
Yes

Extras

Released

2025
2026

Where to buy

Compare prices

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

Lowest price across stores, Amazon excluded.

  • VelocifireCN

    In stock
    $54Visit
  • AmazonGlobal

    Check price
    ~$54Visit
  • MonacoKeysDE

    In stock
    $89Visit
  • AmazonGlobal

    Check price
    ~$89Visit

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.

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