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Head to head · Prices checked Nov 11, 2026

Ajazz AK816 vs Keychron K2 Ultra

Get the Ajazz AK816 for knob. Get the Keychron K2 Ultra for the 4,000 mAh battery and qmk.

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Quick verdict

Which one should you get?

Get the

Ajazz AK816

Knob

Build quality in the bottom 15% of 75% boards under $150.

Rules this board out

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

Get the

Keychron K2 Ultra

Battery

Build quality in the top 10% of 75% boards under $150.

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.

Ajazz AK816

Keychron K2 Ultra

  • Battery

    3,000 mAh

    4,000 mAh

    A larger battery means fewer cables during the day

  • Switch options

    Linear

    Clicky, Linear, Tactile

  • Knob

    Yes

    No

  • QMK

    No

    Yes

    The deep option when you want to remap every key

  • VIA

    No

    Yes

    GUI remapping without compiling firmware

KeebFinder scores

How we score
  • Ajazz AK816
  • Keychron K2 Ultra
Performance
51
90
Build quality
48
86
Productivity
59
94
Customizability
62
92
Portability
79
82

What they share

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

Full specs

Ajazz AK816 vs Keychron K2 Ultra specs

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

13 of 26 specs differ

Ajazz AK816

Keychron K2 Ultra

Typing & switches

Switch options

Linear
Clicky, Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

No
Yes

Screw-in stabilizers

No
Yes

Layout

Layout size

75%
75%

Layout standard

ANSI
ANSI, ISO, ISO-ES, ISO-FR, ISO-IT

Ergonomics

Standard
Standard

Knob

Yes
No

Display

None
None

Media keys

No
Yes

Connectivity & battery

Connection

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

Max polling rate

—
8,000 Hz

Battery

3,000 mAh
4,000 mAhBetter

USB-C

Yes
Yes

Build & materials

Case material

—
ABS, Aluminum

Plate material

—
Steel

Keycaps

PBT
PBT

Weight

—
1,084 g

Dimensions

—
31 x 312 x 122 mm

Backlight

RGB
RGB, south-facing

Firmware & software

QMK

No
Yes

VIA

No
Yes

N-key rollover

No
Yes

Mac & Windows

No
Yes

Extras

Released

2024
2026

For EU buyers

ISO layouts by store

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

Ajazz AK816

No ISO layout at the stores we track.

Keychron K2 Ultra

  • Keychron (DE)

    ISO-FR, ISO-ES, ISO-IT

    In 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.

Ajazz AK8162 stores

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