Compare Epomaker EK21 vs RT82 Differences Side by Side

This comparison is for users deciding between expanding their setup with a dedicated numpad or upgrading their main keyboard. The Epomaker EK21 is a 20-key numpad, while the RT82 is a complete 80-key 75% layout keyboard. Both share core Epomaker features like triple-mode connectivity, VIA programmability, and gasket-mount construction, making the choice a matter of primary function versus supplemental utility. The decision hinges on whether you need a standalone number pad or a new daily driver.

Model
	-10% off 84	79	Select a keyboard to compare
Rating	4.6 stars (14 reviews)	4.6 stars (37 reviews)
Purchase Options
Main differences	Has Linear switch options Available in a Numpad layout Comes with a knob Includes a No display Equipped with a 1000 mAh battery Weighs about 200 g Sized at 29 x 138 x 93 mm Offers Yes, Rgb RGB lighting	Has Linear, Silent switch options Available in a 75% layout Includes a Yes, LCD display Equipped with a 4000 mAh battery Weighs about 1000 g Sized at 40 x 327 x 143 mm Offers Yes, Rgb, South-face, Rgb South-face RGB lighting
Score	Scores Performance: 77.9 Build Quality: 76.8 Productivity: 87.5 Customizability: 82.9 Portability: 87.7	Scores Performance: 78.7 Build Quality: 74.1 Productivity: 83.4 Customizability: 78.6 Portability: 79.9
Name	Name Epomaker EK21	Name Epomaker RT82
Release year	Release year 2025	Release year 2025
Switch Options	Switch Options Linear	Switch Options Linear, Silent
Profile	Profile Normal Profile	Profile Normal Profile
Hot Swappable	Hot Swappable	Hot Swappable
Layout Size	Layout Size Numpad	Layout Size 75%
Layout Standard	Layout Standard ANSI	Layout Standard ANSI
Layout Ergonomics	Layout Ergonomics Normal	Layout Ergonomics Normal
Knob Support	Knob Support	Knob Support
Display Support	Display Support	Display Support LCD
Mac/Win Support	Mac/Win Support	Mac/Win Support
Multi-Media Keys	Multi-Media Keys	Multi-Media Keys
USB-C	USB-C	USB-C
USB passthrough	USB passthrough	USB passthrough
Connection	Connection Bluetooth, 2.4 GHz, Wired, Wireless	Connection Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate	Polling Rate 1000 Hz	Polling Rate 1000 Hz
Battery capacity	Battery capacity 1000 mAh	Battery capacity 4000 mAh
Hall Effect Support	Hall Effect Support	Hall Effect Support
QMK Support	QMK Support	QMK Support
VIA Support	VIA Support	VIA Support
VIAL Support	VIAL Support	VIAL Support
N-Key Rollover	N-Key Rollover	N-Key Rollover
Rapid Trigger	Rapid Trigger	Rapid Trigger
Mount Style	Mount Style Gasket Mount	Mount Style Gasket Mount
Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers
Sound Dampening	Sound Dampening	Sound Dampening
Backlight	Backlight Rgb	Backlight Rgb, South-face
Case Colors	Case Colors	Case Colors
Case Material	Case Material ABS	Case Material ABS
Keycaps Material	Keycaps Material PBT	Keycaps Material PBT
Dimensions	Dimensions 29 x 138 x 93 mm	Dimensions 40 x 327 x 143 mm
Weight	Weight 200g	Weight 1000g

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Pros and Trade-offs

Your need dictates the choice. The Epomaker RT82 is a comprehensive daily-use keyboard that balances a compact layout with premium features like a customizable screen and extensive sound dampening. The Epomaker EK21 is a specialized, high-quality tool for users who already have a compact main keyboard and miss a numpad, or for those seeking a programmable macropad. Prioritize the RT82 for an all-in-one solution and the EK21 for expanding your current setup.

Epomaker EK21

+Extremely portable at 200g with a 20-key numpad footprint.
+Includes a programmable aluminum alloy knob for volume or macros.
+Features a flex-cut PCB and plate for a softer typing feel.
+Comes with three layers of sound dampening foam (Poron, sandwich foam, IXPE switch pad).
+Lower cost entry point for adding VIA-programmable, gasket-mount functionality.

−Not a standalone keyboard; requires a separate main keyboard.
−Smaller 1000mAh battery, though appropriate for its size and function.
−Lacks the adjustable ergonomics and switch variety of the larger model.

Epomaker RT82

+Versatile 75% layout with 80 keys, including arrows and function row.
+Includes a magnetically detachable 1.14-inch LCD screen for customization.
+Large 4000mAh battery with up to 115 hours of use (RGB and screen off).
+Offers a silent linear switch option (Sea Salt Silent) for quiet environments.
+Features a five-layer sound dampening system and a two-stage adjustable kickstand.

−Larger, heavier design (1kg) is less portable.
−Higher price point compared to the numpad.
−The vendor description notes some users reported challenges with the screen configuration tool.

Which Keyboard Is Better for Your Needs?

The RT82 is the clear choice as a primary keyboard for gaming, office work, programming, and content creation due to its complete layout and unique screen. The EK21 excels only in portability for travel, serving as a supplemental device. For modding enthusiasts, both offer a strong foundation with hot-swap sockets and VIA support, making them equally viable projects.

GamingEpomaker RT82

•The RT82 offers a full 75% layout with arrow and function keys essential for many games.
•Both have a 1000Hz polling rate in wired/2.4GHz modes for low latency.
•The RT82's south-facing RGB LEDs prevent interference with Cherry-profile keycaps.

OfficeEpomaker RT82

•The RT82's 75% layout includes all primary keys for document editing and data entry.
•It offers a silent linear switch option, listed as the Sea Salt Silent Switch.
•The adjustable kickstand provides three typing angles (5°, 7.5°, 11°) for ergonomics.

ProgrammingEpomaker RT82

•The RT82 provides dedicated arrow keys and a function row, crucial for coding efficiency.
•Full VIA programmability allows for complex macros and key remapping.
•The 75% layout saves desk space while retaining most necessary keys.

TravelEpomaker EK21

•The EK21 is significantly smaller (29 x 138 x 93 mm) and lighter (200g).
•Its 1000mAh battery is sufficient for a numpad's lower power draw.
•The compact form factor easily fits in a laptop bag as a supplement.

ModdingTie

•Both keyboards are hot-swappable and compatible with 3-pin and 5-pin mechanical switches.
•Both support full programmability via VIA software.
•The EK21 features a flex-cut PCB and plate, while the RT82 includes a five-layer sound dampening system (Sandwich Latex, IXPE, PET, foam, silicone).

Content CreationEpomaker RT82

•The RT82's detachable 1.14-inch LCD screen can display media, time, or custom GIFs.
•The full layout is necessary for shortcut-heavy editing software.
•South-facing per-key RGB backlighting is customizable for aesthetic setups.