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Head to head · Prices checked Nov 10, 2026

Azio KB540 vs Keychron B3 Pro

Get the Azio KB540 for hot-swappable.

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Quick verdict

Which one should you get?

Get the

Azio KB540

Hot-swappable

Build quality in the bottom 40% of 100% boards under $100.

Get the

Keychron B3 Pro

Build quality in the bottom 5% of 75% boards under $50.

Rules this board out

  • Switches are soldered. Swapping them means soldering.
  • Low-profile switches and keycaps only. Standard MX keycaps will not fit.
  • No numpad.

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.

Azio KB540

Keychron B3 Pro

  • Layout size

    100%

    75%

  • Connection

    Bluetooth, Wired

    Bluetooth, 2.4 GHz, Wired

    Wireless for several devices and wired for lower latency

  • Hot-swappable

    Yes

    No

    Switch changes without soldering

  • Low profile

    No

    Yes

  • Case material

    Plastic

    ABS

KeebFinder scores

How we score
  • Azio KB540
  • Keychron B3 Pro
Performance
65
50
Build quality
52
43
Productivity
77
70
Customizability
69
47
Portability
55
79
See every spec side by side

Full specs

Azio KB540 vs Keychron B3 Pro specs

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

11 of 20 specs differ

Azio KB540

Keychron B3 Pro

Typing & switches

Switch options

—
Clicky, Linear, Tactile

Hot-swappable

Yes
No

Low profile

No
Yes

Layout

Layout size

100%
75%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Display

None
None

Media keys

No
Yes

Connectivity & battery

Connection

Bluetooth, Wired
Bluetooth, 2.4 GHz, Wired

Max polling rate

—
1,000 Hz

Battery

—
1,200 mAh

USB-C

Yes
Yes

Build & materials

Case material

Plastic
ABS

Keycaps

ABS, PBT
ABS

Weight

816 g
410 g

Dimensions

27 x 195 x 459 mm
3 x 100 x 380 mm

Typing angle

—
3°

Backlight

RGB
None

Firmware & software

Mac & Windows

Yes
Yes

Extras

Released

2020
2025

Where to buy

Compare prices

Live prices from the stores we track, cheapest in-stock offer first.

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Lowest price across stores, Amazon excluded.

Azio KB5402 stores

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