Head to head · Prices checked Oct 29, 2026

Nuphy Air75 V2 vs Jamesdonkey RS2 4.0

Get the Jamesdonkey RS2 4.0 for knob.

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from$75at Nuphy

Knob

from$99at Mechkeys

Quick verdict

Which one should you get?

Get the

Nuphy Air75 V2

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

Rules this board out

Low-profile switches and keycaps only. Standard MX keycaps will not fit.
South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
No numpad.

$75 at Nuphy

Get the

Jamesdonkey RS2 4.0

Knob

Build quality in the top 35% of 96% boards under $100.

Rules this board out

Compact full-size layout. The numpad is present, the gaps of a full-size board are not.

$99 at Mechkeys

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.

Nuphy Air75 V2

Jamesdonkey RS2 4.0

Layout size
75%
96%
Low profile
Yes
No
Case material
ABS, Aluminum
Aluminum
Switch options
Linear, Low-profile Mechanical, Tactile
Linear
Knob
No
Yes

KeebFinder scores

How we score

Nuphy Air75 V2
Jamesdonkey RS2 4.0

Performance: 81
58
Build quality: 80
71
Productivity: 89
93
Customizability: 94
82
Portability: 79
53

What they share

Connection: Bluetooth, 2.4 GHz, Wired
Hot-swappable
Battery: 4,000 mAh
QMK
Sound dampening
Keycaps: PBT

See every spec side by side

Full specs

Nuphy Air75 V2 vs Jamesdonkey RS2 4.0 specs

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

11 of 27 specs differ

Spec

Nuphy Air75 V2

Jamesdonkey RS2 4.0

Typing & switches

Switch options

Linear, Low-profile Mechanical, Tactile

Linear

Hot-swappable

Yes

Mount style

—

Gasket Mount

Low profile

Yes

Sound dampening

Yes

Layout

Layout size

75%

96%

Layout standard

ANSI

Ergonomics

Standard

Knob

Yes

Display

None

Media keys

Yes

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired

Max polling rate

1,000 Hz

—

Battery

4,000 mAh

USB-C

Yes

Build & materials

Case material

ABS, Aluminum

Aluminum

Plate material

Aluminum

—

Keycaps

PBT

Weight

598 g

1,150 g

Dimensions

14 x 316 x 133 mm

34 x 405 x 138 mm

Typing angle

9°

—

Backlight

RGB, south-facing

RGB

Firmware & software

QMK

Yes

VIA

Yes

N-key rollover

Yes

Mac & Windows

Yes

Extras

Released

2023

2024

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.

Nuphy Air75 V23 stores