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Head to head · Prices checked Oct 21, 2026

Keydous NJ81 vs Apos NPKC RO75

Get the Apos NPKC RO75 for the 6,000 mAh battery.

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.

Keydous NJ81

Apos NPKC RO75

  • Battery

    4,000 mAh

    6,000 mAh

  • Case material

    Plastic

    Aluminum

  • Switch options

    Clicky, Linear

    Linear, Tactile

  • Display

    Yes

    None

  • Weight

    970 g

    1,680 g

KeebFinder scores

How we score
  • Keydous NJ81
  • Apos NPKC RO75
Performance
49
86
Build quality
55
81
Productivity
65
88
Customizability
79
82
Portability
80
92

What they share

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

Full specs

Keydous NJ81 vs Apos NPKC RO75 specs

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

13 of 24 specs differ

Keydous NJ81

Apos NPKC RO75

Typing & switches

Switch options

Clicky, Linear
Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

No
Yes

Layout

Layout size

75%
75%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Display

Yes
None

Connectivity & battery

Connection

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

Max polling rate

—
4,000 Hz

Battery

4,000 mAh
6,000 mAhBetter

USB-C

Yes
Yes

Build & materials

Case material

Plastic
Aluminum

Plate material

Brass, Steel
FR4, Polycarbonate

Keycaps

PBT
ABS, PBT

Weight

970 g
1,680 g

Dimensions

36 x 134 x 315 mm
35 x 312 x 135 mm

Typing angle

—
15°

Backlight

RGB
RGB

Firmware & software

VIA

No
Yes

VIAL

No
Yes

N-key rollover

No
Yes

Mac & Windows

Yes
Yes

Extras

Released

2022
2025

Where to buy

Compare prices

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

Lowest price across stores, Amazon excluded.

Keydous NJ812 stores
  • MechkeysCN

    In stock
    $99Visit
  • AmazonGlobal

    Check price
    ~$99Visit
  • AposUS

    In stock
    $109Visit
  • AmazonGlobal

    Check price
    ~$109Visit

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