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Head to head · Prices checked Oct 21, 2026

Jamesdonkey RS2 4.0 vs Keychron B5 Pro

Get the Jamesdonkey RS2 4.0 for hot-swappable and the 4,000 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.

Jamesdonkey RS2 4.0

Keychron B5 Pro

  • Layout size

    96%

    100%

  • Hot-swappable

    Yes

    No

  • Battery

    4,000 mAh

    1,200 mAh

  • Case material

    Aluminum

    ABS

  • Switch options

    Linear

    Clicky, Linear, Tactile

KeebFinder scores

How we score
  • Jamesdonkey RS2 4.0
  • Keychron B5 Pro
Performance
58
51
Build quality
71
43
Productivity
93
70
Customizability
82
49
Portability
53
52

What they share

  • Connection: Bluetooth, 2.4 GHz, Wired
See every spec side by side

Full specs

Jamesdonkey RS2 4.0 vs Keychron B5 Pro specs

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

13 of 23 specs differ

Jamesdonkey RS2 4.0

Keychron B5 Pro

Typing & switches

Switch options

Linear
Clicky, Linear, Tactile

Hot-swappable

Yes
No

Mount style

Gasket Mount
—

Sound dampening

Yes
No

Layout

Layout size

96%
100%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

Yes
No

Display

None
None

Media keys

Yes
Yes

Connectivity & battery

Connection

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

Max polling rate

—
1,000 Hz

Battery

4,000 mAhBetter
1,200 mAh

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
ABS

Keycaps

PBT
ABS

Weight

1,150 g
623 g

Dimensions

34 x 405 x 138 mm
10 x 438 x 121 mm

Typing angle

—
3°

Backlight

RGB
None

Firmware & software

QMK

Yes
No

Mac & Windows

Yes
Yes

Extras

Released

2024
2025

Where to buy

Compare prices

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

Lowest price across stores, Amazon excluded.

  • MechkeysCN

    In stock
    $99Visit
  • AmazonGlobal

    Check price
    ~$99Visit
  • WhatGeekCN

    Out of stock
    $108Visit
  • KeychronHK

    In stock
    $39Visit
  • Keychron (DE)DE

    In stock
    $65Visit
  • AmazonGlobal

    Check price
    Visit

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