Epomaker Luma40 vs RT7540% or 75% layout?
Choose the Luma40 for a light, aluminum 40% ortholinear board with QMK and VIA, or the RT75 for a more conventional 75% layout with a detachable TFT screen.
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5.0 · 3 reviews
from$92at Epomaker
90-day lowLowest price in 90 days
5.0 · 1 reviews
from$91at Epomaker
90-day lowLowest price in 90 days
Which one should you get?
Get the
Epomaker Luma40
Build quality in the top 15% of 40% boards under $150.
- CNC aluminum case and 410g listed weight.
- 40% ortholinear layout with low-profile design.
- QMK and VIA support, plus hot-swappable low-profile switches.
- Low-profile switches and keycaps only. Standard MX keycaps will not fit.
- North-facing LEDs. Cherry-profile keycaps can hit the switch housing.
- Compact layout only. No function row, dedicated arrow keys, or numpad.
Get the
Epomaker RT75
Battery
Build quality in the top 50% of 75% boards under $100.
- 75% layout with a detachable TFT screen that can be replaced by 4 keys.
- 5000mAh battery and Bluetooth, 2.4 GHz and wired connectivity.
- Gasket mount with a 6-layer sound-dampening system.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
- No numpad.
Choose the Luma40 if you specifically want a lightweight CNC aluminum 40% ortholinear keyboard and value its stated QMK and VIA support. Pick the RT75 if you want a 75% layout with more keys, a detachable TFT module and a larger battery. Both offer hot-swap switches and three connection modes, so layout is the deciding factor.
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 Luma40
Epomaker RT75
Layout size
40%
75%
Battery
1,450 mAh
5,000 mAh
A larger battery means fewer cables during the day
Low profile
Yes
No
Ergonomics
Ortholinear
Standard
Case material
Aluminum
ABS
- Epomaker Luma40
- Epomaker RT75
- Performance
- 7461
- Build quality
- 8166
- Productivity
- 8876
- Customizability
- 8566
- Portability
- 8580
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Max polling rate: 1,000 Hz
- Sound dampening
- Plate material: Polycarbonate
What will you mostly use it for?
The Luma40 gets the edge for travel and programming, thanks to its low weight and explicit QMK and VIA support. Its 40% layout demands comfort with a compact ortholinear format, so the RT75 is a more practical office choice for buyers wanting more keys. The RT75 also suits screen-focused desk setups, while the Luma40 offers more explicit remapping features for customization. For gaming, both list the same polling rate in wired and 2.4 GHz modes, with the Luma40's N-Key Rollover providing a concrete distinction.
Pick the Epomaker Luma40
- Both list a 1000 Hz polling rate in wired and 2.4 GHz modes.
- The Luma40 supports N-Key Rollover and has a 40% ortholinear layout.
- The RT75 offers a larger 75% layout, but its compatibility rules note that it has no numpad.
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
Epomaker Luma40
3 owner reviews
“Hello there the luma 40 is one of my favorite keebs i used i can bring it anywhere with me i really love it thanks u guys”
Epomaker RT75
1 owner reviews
“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…”
Epomaker Luma40 vs RT75 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
16 of 25 specs differ
Epomaker Luma40
Epomaker RT75
Switch options
Hot-swappable
Mount style
Low profile
Sound dampening
Layout size
Layout standard
Ergonomics
Display
Connection
Max polling rate
Battery
USB-C
Case material
Plate material
Keycaps
Weight
Dimensions
Typing angle
Backlight
QMK
VIA
N-key rollover
Mac & Windows
Released
Compare prices
Live prices from the stores we track, cheapest in-stock offer first.
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Epomaker Luma40 vs RT75: your questions
The Luma40 is a 40% ortholinear low-profile keyboard with an aluminum case. The RT75 is a 75% board with a detachable TFT screen and a gasket-mounted structure.
Yes. The Luma40 is listed at 410g and 21 x 240 x 87 mm, while the RT75 is 1165g and 45 x 352 x 142 mm.
The RT75 has the larger layout, listed as 83 keys plus 4 keys or 1 screen. Epomaker lists the Luma40 as a 47-key 40% keyboard.
Yes, QMK and VIA support are listed for the Luma40. Those features are not listed for the RT75.
No. The Luma40 compatibility rules specify low-profile switches and keycaps only, and standard MX keycaps will not fit.
Yes. Epomaker describes the RT75's TFT module as detachable and says it can be swapped for 4 keys. The screen can also display GIFs, images or a clock.
Both list Bluetooth and 2.4 GHz wireless, as well as wired connectivity. The Luma40 has a 1450mAh battery, while the RT75 has a 5000mAh battery; battery life comparisons are not available for both models.
Yes, both are listed as hot-swappable. The Luma40 takes Kailh low-profile mechanical switches, while the RT75 is described as having a hot-swap PCB.
The RT75 offers a silent tactile switch option and a 6-layer sound-dampening system. The Luma40 has foam dampening and pre-lubed low-profile switches, but its listed switch options are clicky and linear.
Both list Mac and Windows support, and Epomaker describes Mac modifier keycaps for each model. The Luma40 also lists Android compatibility in its vendor description.
The Luma40's north-facing LEDs can cause Cherry-profile keycaps to hit the switch housing. The RT75 uses Cherry-profile PBT keycaps, but its south-facing LED compatibility note warns that some sculpted keycaps can clip the LED.
The RT75 has a listed 5000mAh battery, compared with 1450mAh for the Luma40. Epomaker lists the Luma40's battery life as up to 75 hours with RGB off, but a comparable RT75 battery-life figure is not supplied.
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