Head to head · Prices checked Nov 10, 2026

AULA F99 Max vs Keychron K4 Max

Get the AULA F99 Max for the 8,000 mAh battery and knob.

KeebFinder may earn a commission when you buy through these links, at no extra cost to you.

Battery

AULA F99 Max

4.5 (2)4.5 · 2 reviews

from$84at Epomaker

90-day lowLowest price in 90 days

Compare 2 stores

Keychron K4 Max

5.0 (1)5.0 · 1 reviews

from$99at Keychron

Compare 3 stores

Quick verdict

Which one should you get?

Get the

AULA F99 Max

Battery

Build quality in the top 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.

$84 at Epomaker

Get the

Keychron K4 Max

Build quality in the top 20% 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.

$99 at Keychron

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.

AULA F99 Max

Keychron K4 Max

Battery
8,000 mAh
4,000 mAh
A larger battery means fewer cables during the day
Switch options
Linear
Clicky, Linear, Tactile
Mount style
Gasket Mount
PCB Mount
Knob
Yes
No
Display
TFT
None
A case display rather than a typing feature

KeebFinder scores

How we score

AULA F99 Max
Keychron K4 Max

Performance: 66
82
Build quality: 68
80
Productivity: 83
89
Customizability: 73
92
Portability: 63
51

What they share

Layout size: 96%
Connection: Bluetooth, 2.4 GHz, Wired
Hot-swappable
Max polling rate: 1,000 Hz
Case material: ABS
Sound dampening

See every spec side by side

From real owners

What owners say

Ratings and quotes collected from verified store reviews, including the critical ones.

AULA F99 Max

4.5

2 owner reviews

Praise

“Wish is had like a thickly more creamy sound but gets the job done”

Isaiah B.Verified buyer· via Epomaker

Keychron K4 Max

5.0

1 owner reviews

Full specs

AULA F99 Max vs Keychron K4 Max specs

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

16 of 27 specs differ

Spec

AULA F99 Max

Keychron K4 Max

Typing & switches

Switch options

Linear

Clicky, Linear, Tactile

Hot-swappable

Yes

Mount style

Gasket Mount

PCB Mount

Sound dampening

Yes

Screw-in stabilizers

Yes

Layout

Layout size

96%

Layout standard

ANSI

ANSI, ISO

Ergonomics

Standard

Knob

Yes

Display

TFT

None

Media keys

Yes

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired

Max polling rate

1,000 Hz

Battery

8,000 mAhBetter

4,000 mAh

USB-C

Yes

Build & materials

Case material

ABS

Plate material

Polycarbonate

Steel

Keycaps

PBT

Weight

1,175 g

1,290 g

Dimensions

43 x 139 x 407 mm

31 x 391 x 140 mm

Typing angle

—

3°

Backlight

RGB, south-facing

Firmware & software

QMK

Yes

VIA

Yes

N-key rollover

Yes

Mac & Windows

Yes

Extras

Released

2026

2025

For EU buyers

ISO layouts by store

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

AULA F99 Max

No ISO layout at the stores we track.

Keychron K4 Max

Keychron
ISO
In stockShips 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.

AULA F99 Max2 stores