Epomaker EK21 vs RT75Numpad or 75% Keyboard
Choose the EK21 for a dedicated numpad with VIA support and a knob, or the RT75 for a complete 75% keyboard with a detachable TFT screen.
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4.5 · 34 reviews
from$33at 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 EK21
Knob
Build quality in the top 25% of Numpad boards under $50.
- Compact 20-key numpad with listed dimensions of 29 x 138 x 93 mm and weight of 200g.
- VIA support and an aluminum alloy knob, according to the vendor description.
- Gasket mount, polycarbonate plate, and vendor-described three-layer PORON and IXPE dampening.
- Numpad only. This is not a full keyboard.
Get the
Epomaker RT75
Battery
Build quality in the top 50% of 75% boards under $100.
- 75% ANSI layout with 83 keys and a detachable TFT screen that can be swapped for four keys.
- 5000mAh battery and Bluetooth, 2.4 GHz, and wired connectivity.
- Gasket mount with a vendor-described six-layer dampening system, including PORON, PET, acoustic foam, and silicone.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
- No numpad.
Choose the EK21 if you already have a main keyboard and want a compact numpad with VIA support and a knob. Choose the RT75 if you need a standalone 75% keyboard, value its detachable TFT screen, or want the larger listed battery. Before buying the RT75, consider its south-facing LED compatibility with shine-through or some sculpted keycaps.
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 EK21
Epomaker RT75
Layout size
Numpad
75%
Battery
1,000 mAh
5,000 mAh
A larger battery means fewer cables during the day
Switch options
Linear
Linear, Silent, Tactile
Knob
Yes
No
Display
None
TFT
A case display rather than a typing feature
- Epomaker EK21
- Epomaker RT75
- Performance
- 7861
- Build quality
- 7666
- Productivity
- 8776
- Customizability
- 8266
- Portability
- 8880
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Max polling rate: 1,000 Hz
- Case material: ABS
- Mount style: Gasket Mount
- Sound dampening
What will you mostly use it for?
The RT75 makes more sense when you need a main keyboard for gaming, office work, programming, or content creation, with its full 75% layout and detachable screen. The EK21 is the more practical travel pick based on its listed size and weight. For modding, the EK21 has an edge in the listed customization features because it adds VIA support to hot-swapping. Both offer tri-mode connectivity and a 1000 Hz polling rate in the product metadata.
Pick the Epomaker RT75
- The RT75's 75% layout is a complete keyboard layout, while the EK21 is a numpad only.
- Both list a 1000 Hz polling rate and Bluetooth, 2.4 GHz, and wired connectivity.
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
Epomaker EK21
34 owner reviews
“Great wireless connectivity, sounds and feels as good as my 200$ custom keyboard. Great buy especially with the discount, would definitely buy again.”
“I have had this thing for years, I have updated to every Json file and firmware file I can find and it has NEVER worked right, Either the Json file or the firmware is jacked up and no one at Epomaker can give me any explanation. This numpad is the reason I…”
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 EK21 vs RT75 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
11 of 24 specs differ
Epomaker EK21
Epomaker RT75
Switch options
Hot-swappable
Mount style
Sound dampening
Layout size
Layout standard
Ergonomics
Knob
Display
Connection
Max polling rate
Battery
USB-C
Case material
Plate material
Keycaps
Weight
Dimensions
Typing angle
Backlight
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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Lowest price across stores, Amazon excluded.
Epomaker EK21 vs RT75: your questions
No. The EK21 is a numpad-only product, so it is designed to add number-pad keys rather than serve as a complete keyboard.
The RT75 has a 75% ANSI layout with 83 keys, making it the main-keyboard option in this comparison. Its screen module can be replaced with four keys.
The EK21 is a compact numpad with VIA support and an aluminum alloy knob. The RT75 is a 75% keyboard with a detachable TFT screen and a larger listed battery.
Yes. The EK21 metadata lists VIA support, and the vendor describes it as VIA programmable.
Both keyboards are listed as hot-swappable. The EK21 vendor description specifies 3-pin and 5-pin switch compatibility.
No. The RT75 compatibility notes say it has no numpad. The EK21 provides a numpad layout, but it is not a full keyboard.
The vendor says the detachable RT75 screen can display GIFs, images, a clock, or system information. It can also be removed and replaced with four keys.
The EK21 is listed at 200g and measures 29 x 138 x 93 mm. The RT75 is listed at 1165g and measures 45 x 352 x 142 mm.
Both list Bluetooth and 2.4 GHz wireless, as well as wired connectivity. The EK21 vendor describes these as tri-mode connections using Bluetooth, 2.4 GHz, and USB-C.
The RT75 has a listed 5000mAh battery, while the EK21 has a 1000mAh battery. Battery capacity alone does not establish how long either keyboard will run between charges.
The RT75 compatibility notes warn that shine-through legends stay dark with its south-facing LEDs. They also note that some sculpted keycaps can clip the LED.
The EK21 is substantially smaller and lighter on the listed dimensions and weight, but it is only a numpad. The RT75 provides a 75% layout, but weighs 1165g and is larger.
Not sold on either?
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