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

Head to head · Prices checked Nov 2, 2026

Mechboards CFTKB Mysterium Kit V1 vs Xinmeng A66

Get the Xinmeng A66 for hot-swappable and 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

Mechboards CFTKB Mysterium Kit V1

Build quality in the bottom 15% of 75% boards under $100.

Rules this board out

  • Switches are soldered. Swapping them means soldering.
  • No numpad.

Get the

Xinmeng A66

Hot-swappable

Build quality in the bottom 45% of 65% boards under $100.

Rules this board out

  • No ISO layout. ISO-DE, UK, and other ISO variants are not offered.
  • 65% layout. No function row and 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.

Mechboards CFTKB Mysterium Kit V1

Xinmeng A66

  • Layout size

    75%

    65%

  • Hot-swappable

    No

    Yes

    Switch changes without soldering

  • Case material

    Acrylic

    Aluminum

  • Knob

    No

    Yes

  • Layout standard

    ANSI, ISO

    ANSI

    ISO and JIS exist so regional layouts fit

KeebFinder scores

How we score
  • Mechboards CFTKB Mysterium Kit V1
  • Xinmeng A66
Performance
43
40
Build quality
48
62
Productivity
43
65
Customizability
46
66
Portability
56
88
See every spec side by side

Full specs

Mechboards CFTKB Mysterium Kit V1 vs Xinmeng A66 specs

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

9 of 17 specs differ

Mechboards CFTKB Mysterium Kit V1

Xinmeng A66

Typing & switches

Hot-swappable

No
Yes

Mount style

—
Gasket Mount

Layout

Layout size

75%
65%

Layout standard

ANSI, ISO
ANSI

Ergonomics

Standard
Standard

Knob

No
Yes

Display

None
None

Connectivity & battery

Connection

—
Bluetooth, 2.4 GHz, Wired

Battery

—
4,600 mAh

USB-C

No
Yes

Build & materials

Case material

Acrylic
Aluminum

Plate material

FR4
FR4, Plastic

Weight

—
1,800 g

Dimensions

—
20 x 113 x 322 mm

Backlight

None
None

Firmware & software

Mac & Windows

No
Yes

Extras

Released

2021
2023

For EU buyers

ISO layouts by store

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

Mechboards CFTKB Mysterium Kit V1

Listed on the product, not split by store: ISO.

Xinmeng A66

No ISO layout at the stores we track.

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.

Xinmeng A663 stores

Still torn?

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