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

Head to head · Prices checked Nov 11, 2026

DOIO KB03 04 vs Yunzii AL21

Get the Yunzii AL21 for knob.

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

DOIO KB03 04

Rules this board out

  • Macropad only. This is not a full keyboard.
$49 at WhatGeek

Get the

Yunzii AL21

Knob

Build quality in the top 10% of Numpad boards under $50.

Rules this board out

  • South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
  • Numpad only. This is not a full keyboard.
$49 at Yunzii

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.

DOIO KB03 04

Yunzii AL21

  • Layout size

    Macropad

    Numpad

  • Connection

    Wired

    Bluetooth, 2.4 GHz, Wired

    Wireless for several devices and wired for lower latency

  • Case material

    Acrylic, Aluminum

    Aluminum

  • Knob

    No

    Yes

  • Weight

    205 g

    458 g

    Heavier boards stay planted and lighter ones travel

KeebFinder scores

How we score
  • DOIO KB03 04
  • Yunzii AL21
Performance
67
75
Build quality
80
77
Productivity
82
84
Customizability
89
74
Portability
77
89

What they share

  • Hot-swappable
See every spec side by side

Full specs

DOIO KB03 04 vs Yunzii AL21 specs

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

12 of 22 specs differ

DOIO KB03 04

Yunzii AL21

Typing & switches

Switch options

—
Linear

Hot-swappable

Yes
Yes

Mount style

—
Gasket Mount

Sound dampening

No
Yes

Layout

Layout size

Macropad
Numpad

Layout standard

ANSI
—

Ergonomics

Standard
Standard

Knob

No
Yes

Display

None
None

Connectivity & battery

Connection

Wired
Bluetooth, 2.4 GHz, Wired

Battery

Wired only
1,500 mAh

USB-C

Yes
Yes

Build & materials

Case material

Acrylic, Aluminum
Aluminum

Keycaps

—
PBT

Weight

205 g
458 g

Dimensions

23 x 78 x 104 mm
44 x 136 x 91 mm

Backlight

RGB
RGB, south-facing

Firmware & software

QMK

Yes
No

VIA

Yes
No

N-key rollover

No
Yes

Mac & Windows

Yes
Yes

Extras

Released

2023
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.

Lowest price across stores, Amazon excluded.

DOIO KB03 042 stores
Yunzii AL212 stores

Keep exploring

Not sold on either?

Still torn?

Answer a few quick questions and the keyboard finder ranks 2,000+ boards by how you will actually use yours.

Find my keyboardBrowse all keyboards