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Head to head · Prices checked Nov 12, 2026

Redragon PENUMBRA K687 Pro vs Skyloong GK75

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Quick verdict

Which one should you get?

Get the

Redragon PENUMBRA K687 Pro

Build quality in the top 35% of 75% boards under $100.

Rules this board out

  • No ISO layout. ISO-DE, UK, and other ISO variants are not offered.

Get the

Skyloong GK75

Build quality in the top 25% of 75% boards under $100.

Rules this board out

  • North-facing LEDs. Cherry-profile keycaps can hit the switch housing.

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.

Redragon PENUMBRA K687 Pro

Skyloong GK75

  • Ergonomics

    Standard

    Split Spacebar

  • Case material

    Aluminum

    ABS, Aluminum

  • Switch options

    Linear

    Clicky, Linear, Silent, Tactile

  • Weight

    1,800 g

    1,200 g

    Heavier boards stay planted and lighter ones travel

  • Layout standard

    ANSI

    ANSI, ISO

    ISO and JIS exist so regional layouts fit

KeebFinder scores

How we score
  • Redragon PENUMBRA K687 Pro
  • Skyloong GK75
Performance
79
78
Build quality
73
76
Productivity
70
83
Customizability
61
78
Portability
74
79

What they share

  • Layout size: 75%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Mount style: Gasket Mount
  • Knob
  • Sound dampening
See every spec side by side

Full specs

Redragon PENUMBRA K687 Pro vs Skyloong GK75 specs

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

10 of 21 specs differ

Redragon PENUMBRA K687 Pro

Skyloong GK75

Typing & switches

Switch options

Linear
Clicky, Linear, Silent, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

Yes
Yes

Layout

Layout size

75%
75%

Layout standard

ANSI
ANSI, ISO

Ergonomics

Standard
Split Spacebar

Knob

Yes
Yes

Display

None
None

Connectivity & battery

Connection

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

Battery

—
4,000 mAh

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
ABS, Aluminum

Plate material

—
Polycarbonate, Steel

Keycaps

PBT
ABS, PBT

Weight

1,800 g
1,200 g

Dimensions

43 x 132 x 43 mm
36 x 323 x 41 mm

Backlight

RGB
RGB, north-facing

Firmware & software

N-key rollover

Yes
Yes

Mac & Windows

No
Yes

Extras

Released

2024
2022

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.

For EU buyers

ISO layouts by store

Which stores sell ISO-DE, UK, and the other regional layouts.

Redragon PENUMBRA K687 Pro

No ISO layout at the stores we track.

Skyloong GK75

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