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Head to head · Prices checked Oct 21, 2026

Epomaker RT75 vs Jamesdonkey RS2 4.0

Get the Epomaker RT75 for the 5,000 mAh battery. Get the Jamesdonkey RS2 4.0 for knob.

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.

Epomaker RT75

Jamesdonkey RS2 4.0

  • Layout size

    75%

    96%

  • Battery

    5,000 mAh

    4,000 mAh

  • Case material

    ABS

    Aluminum

  • Switch options

    Linear, Silent, Tactile

    Linear

  • Knob

    No

    Yes

KeebFinder scores

How we score
  • Epomaker RT75
  • Jamesdonkey RS2 4.0
Performance
64
58
Build quality
65
71
Productivity
76
93
Customizability
69
82
Portability
82
53

What they share

  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Mount style: Gasket Mount
  • Sound dampening
  • Keycaps: PBT
See every spec side by side

From real owners

What owners say

Ratings and quotes collected from verified store reviews, including the critical ones.

Epomaker RT75

5.0

1 owner reviews

Praise
“I've been using the Epomaker RT75 for a couple of weeks now as my main keyboard for both productivity and gaming. I got it mainly for its retro design and out of curiosity about the 1.54-inch smart screen, which looks impressive. At first, I thought I'd get…”
Luis V.Verified buyer· via Epomaker

Jamesdonkey RS2 4.0

No owner reviews collected yet.

Full specs

Epomaker RT75 vs Jamesdonkey RS2 4.0 specs

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

12 of 24 specs differ

Epomaker RT75

Jamesdonkey RS2 4.0

Typing & switches

Switch options

Linear, Silent, Tactile
Linear

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

Yes
Yes

Layout

Layout size

75%
96%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

No
Yes

Display

TFT
None

Media keys

No
Yes

Connectivity & battery

Connection

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

Max polling rate

1,000 Hz
—

Battery

5,000 mAhBetter
4,000 mAh

USB-C

Yes
Yes

Build & materials

Case material

ABS
Aluminum

Plate material

Polycarbonate
—

Keycaps

PBT
PBT

Weight

1,165 g
1,150 g

Dimensions

45 x 352 x 142 mm
34 x 405 x 138 mm

Typing angle

6°
—

Backlight

RGB, south-facing
RGB

Firmware & software

QMK

No
Yes

Mac & Windows

Yes
Yes

Extras

Released

2026
2024

Where to buy

Compare prices

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

Lowest price across stores, Amazon excluded.

  • EpomakerUS

    In stock
    $107Visit
  • AmazonGlobal

    Check price
    Visit
  • MechkeysCN

    In stock
    $99Visit
  • AmazonGlobal

    Check price
    ~$99Visit
  • WhatGeekCN

    Out of stock
    $108Visit

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.

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