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Head to head · Prices checked Nov 11, 2026

LingBao K87/K87 Pro vs MMD KM40

Get the LingBao K87/K87 Pro for the 4,000 mAh battery. Get the MMD KM40 for sound dampening.

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Quick verdict

Which one should you get?

Get the

LingBao K87/K87 Pro

Battery

Rules this board out

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

Get the

MMD KM40

Sound dampening

Build quality in the top 10% of 40% boards under $150.

Rules this board out

  • Compact layout only. No function row, dedicated arrow keys, or numpad.
$84 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.

LingBao K87/K87 Pro

MMD KM40

  • Layout size

    87%

    40%

  • Battery

    4,000 mAh

    2,000 mAh

    A larger battery means fewer cables during the day

  • Case material

    Plastic

    Aluminum

  • Weight

    1,050 g

    620 g

    Heavier boards stay planted and lighter ones travel

  • Sound dampening

    No

    Yes

KeebFinder scores

How we score
  • LingBao K87/K87 Pro
  • MMD KM40
Performance
83
60
Build quality
80
82
Productivity
79
69
Customizability
89
83
Portability
54
84

What they share

  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Switch options: Linear, Tactile
  • Mount style: Gasket Mount
  • QMK
  • VIA
See every spec side by side

Full specs

LingBao K87/K87 Pro vs MMD KM40 specs

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

11 of 23 specs differ

LingBao K87/K87 Pro

MMD KM40

Typing & switches

Switch options

Linear, Tactile
Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

No
Yes

Layout

Layout size

87%
40%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Display

None
None

Connectivity & battery

Connection

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

Max polling rate

1,000 Hz
—

Battery

4,000 mAhBetter
2,000 mAh

USB-C

No
Yes

Build & materials

Case material

Plastic
Aluminum

Plate material

Polycarbonate
Polycarbonate

Keycaps

ABS, PBT
PBT

Weight

1,050 g
620 g

Dimensions

43 x 367 x 143 mm
—

Backlight

RGB, south-facing
RGB

Firmware & software

QMK

Yes
Yes

VIA

Yes
Yes

N-key rollover

Yes
No

Mac & Windows

Yes
No

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.

LingBao K87/K87 Pro2 stores
MMD KM402 stores

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