Head to head · Prices checked Nov 13, 2026

Work Louder Knob1 vs Yunzii C21

Get the Work Louder Knob1 for the 3,000 mAh battery and knob. Get the Yunzii C21 for hot-swappable.

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Battery

from$439at zFrontier

Hot-swappable

from$54at Yunzii

Quick verdict

Which one should you get?

Get the

Work Louder Knob1

Battery

Build quality in the bottom 25% of Numpad boards at any price.

Rules this board out

Switches are soldered. Swapping them means soldering.
Low-profile switches and keycaps only. Standard MX keycaps will not fit.

$439 at zFrontier

Get the

Yunzii C21

Hot-swappable

Build quality in the bottom 50% of Numpad boards under $100.

Rules this board out

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

$54 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.

Work Louder Knob1

Yunzii C21

Connection
Bluetooth, Wired
Bluetooth, 2.4 GHz, Wired
Wireless for several devices and wired for lower latency
Hot-swappable
No
Yes
Switch changes without soldering
Battery
3,000 mAh
2,500 mAh
A larger battery means fewer cables during the day
Low profile
Yes
No
Knob
Yes
No

KeebFinder scores

How we score

Work Louder Knob1
Yunzii C21

Performance: 74
69
Build quality: 53
62
Productivity: 77
58
Customizability: 67
66
Portability: 90
88

What they share

Layout size: Numpad

See every spec side by side

Full specs

Work Louder Knob1 vs Yunzii C21 specs

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

9 of 22 specs differ

Spec

Work Louder Knob1

Yunzii C21

Typing & switches

Switch options

—

Linear

Hot-swappable

Yes

Mount style

—

Gasket Mount

Low profile

Yes

Layout

Layout size

Numpad

Layout standard

ANSI

—

Ergonomics

Standard

Knob

Yes

Display

IPS

TFT

Connectivity & battery

Connection

Bluetooth, Wired

Bluetooth, 2.4 GHz, Wired

Max polling rate

—

1,000 Hz

Battery

3,000 mAhBetter

2,500 mAh

USB-C

Yes

Build & materials

Case material

Aluminum

—

Plate material

Polycarbonate

—

Keycaps

PBT

Weight

—

250 g

Dimensions

—

39 x 153 x 98 mm

Backlight

RGB

RGB, south-facing

Firmware & software

N-key rollover

Yes

Mac & Windows

Yes

Extras

Released

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.

Work Louder Knob12 stores