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

Head to head · Prices checked Nov 11, 2026

Royal Kludge F99 vs Keychron K4 Pro

Get the Royal Kludge F99 for the 5,000 mAh battery.

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

Royal Kludge F99

Battery

Build quality in the bottom 45% of 96% boards under $100.

Rules this board out

  • South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
  • No ISO layout. ISO-DE, UK, and other ISO variants are not offered.

Get the

Keychron K4 Pro

Build quality in the top 10% of 96% boards under $100.

Rules this board out

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

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.

Royal Kludge F99

Keychron K4 Pro

  • Connection

    Bluetooth, 2.4 GHz, Wired

    Bluetooth, Wired

    Wireless for several devices and wired for lower latency

  • Battery

    5,000 mAh

    4,000 mAh

    A larger battery means fewer cables during the day

  • Switch options

    Linear, Silent, Tactile

    Clicky, Linear, Tactile

  • Mount style

    Gasket Mount

    Tray Mount

  • Weight

    700 g

    1,280 g

    Heavier boards stay planted and lighter ones travel

KeebFinder scores

How we score
  • Royal Kludge F99
  • Keychron K4 Pro
Performance
61
81
Build quality
60
84
Productivity
76
95
Customizability
59
96
Portability
54
54

What they share

  • Layout size: 96%
  • Hot-swappable
  • Sound dampening
See every spec side by side

Full specs

Royal Kludge F99 vs Keychron K4 Pro specs

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

14 of 27 specs differ

Royal Kludge F99

Keychron K4 Pro

Typing & switches

Switch options

Linear, Silent, Tactile
Clicky, Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Tray Mount

Sound dampening

Yes
Yes

Screw-in stabilizers

No
Yes

Layout

Layout size

96%
96%

Layout standard

ANSI
ANSI, ISO, ISO-DE, ISO-ES, ISO-FR, ISO-Nordic, ISO-SW, ISO-UK

Ergonomics

Standard
Standard

Display

None
None

Media keys

No
Yes

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired
Bluetooth, Wired

Max polling rate

—
1,000 Hz

Battery

5,000 mAhBetter
4,000 mAh

USB passthrough

Yes
No

USB-C

Yes
Yes

Build & materials

Case material

—
ABS, Plastic

Plate material

—
Steel

Keycaps

PBT
ABS, PBT

Weight

700 g
1,280 g

Dimensions

—
31 x 391 x 139 mm

Typing angle

—
3°

Backlight

RGB, south-facing
RGB, south-facing

Firmware & software

QMK

No
Yes

VIA

No
Yes

N-key rollover

No
Yes

Mac & Windows

Yes
Yes

Extras

Released

2025
2022

For EU buyers

ISO layouts by store

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

Royal Kludge F99

No ISO layout at the stores we track.

Keychron K4 Pro

  • Keychron

    ISO-DE, ISO-UK, ISO-Nordic, ISO-FR, ISO-ES, ISO-SW

    Out of stockShips to you

  • Keychron (DE)

    ISO-DE, ISO-UK, ISO-FR, ISO-ES, ISO-SW

    Out of stockDoes not ship to you

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.