Redragon COVE K733 vs Zuoya GMK21 NumpadCalculator or QMK
Choose the Redragon COVE K733 for wireless use and a built-in calculator, or the Zuoya GMK21 for QMK/VIA support and a DIY build.
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Which one should you get?
Get the
Redragon COVE K733
Sound dampening
Build quality in the top 30% of Numpad boards under $50.
- Tri-mode connection: Bluetooth, 2.4 GHz, and wired USB-C.
- Built-in calculator display with PC and Calculator modes.
- Gasket mount and five listed noise-dampening layers, including PO foam, IXPE switch foam, and a silicone bottom pad.
Get the
Zuoya GMK21 Numpad
QMK
Build quality in the top 10% of Numpad boards under $50.
- QMK and VIA compatible, with a GMK21 JSON file listed by the vendor.
- DIY kit/barebones format for a build-your-own numpad setup.
- 5-pin hot-swappable sockets.
Pick the Redragon COVE K733 if you want a pre-built numpad with wireless connectivity, calculator functions, and a specified polling rate. Choose the Zuoya GMK21 if QMK/VIA support and a DIY kit matter more than built-in calculator and wireless features. Both are hot-swappable and include a knob, so let the ready-to-use versus customization distinction guide the decision.
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.
Redragon COVE K733
Zuoya GMK21 Numpad
Display
Yes
None
A case display rather than a typing feature
QMK
No
Yes
The deep option when you want to remap every key
VIA
No
Yes
GUI remapping without compiling firmware
Sound dampening
Yes
No
Mac & Windows
Yes
No
- Redragon COVE K733
- Zuoya GMK21 Numpad
- Performance
- 8461
- Build quality
- 7379
- Productivity
- 8365
- Customizability
- 7994
- Portability
- 8865
- Layout size: Numpad
- Hot-swappable
- Knob
What will you mostly use it for?
The COVE K733 is the more fully equipped pick for wireless desk use, calculator tasks, and portable use where the listed dimensions and weight matter. Its stated polling rate also makes it the more clearly specified option for gaming. The GMK21 stands out for programming and hands-on customization because it is a DIY kit with QMK/VIA support. For content creation, the COVE's calculator display and knob give it the more task-specific features, though neither listing describes dedicated creation controls.
Pick the Redragon COVE K733
- The COVE K733 specifies an 8,000 Hz polling rate.
- Its linear switches, gasket mount, and RGB lighting are specified features.
Redragon COVE K733 vs Zuoya GMK21 Numpad specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
7 of 20 specs differ
Redragon COVE K733
Zuoya GMK21 Numpad
Switch options
Hot-swappable
Mount style
Sound dampening
Layout size
Layout standard
Ergonomics
Knob
Display
Connection
Max polling rate
USB-C
Case material
Weight
Dimensions
Backlight
QMK
VIA
Mac & Windows
Released
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Redragon COVE K733 vs Zuoya GMK21 Numpad: your questions
The COVE K733 is a pre-built numpad with Bluetooth, 2.4 GHz, wired USB-C, and a built-in calculator display. The GMK21 is a DIY kit with QMK/VIA support and 5-pin hot-swappable sockets.
Yes, the COVE K733 has a built-in calculator display and PC and Calculator modes. The product listing describes it as a 22-key numpad with a 10-digit display.
Yes, the GMK21 listing says it is VIA/QMK compatible. The listing also provides a GMK21 JSON file.
The COVE K733 specifies Bluetooth, 2.4 GHz, and wired connectivity. The GMK21 listing does not specify a wireless connection.
Both products are listed as hot-swappable. The GMK21 specifically has 5-pin hot-swappable sockets, while the COVE K733 vendor describes its switches as free-mod hot-swappable.
The GMK21 is presented as a DIY kit or barebones board and supports QMK/VIA, making it the more directly customization-oriented option. The COVE K733 is also hot-swappable, but is listed as a pre-built product.
Yes, the COVE K733 is listed with RGB backlighting. The GMK21 listing also specifies multicolor backlighting.
The COVE K733 is listed with an 8,000 Hz polling rate. No polling-rate figure is specified for the GMK21.
The GMK21 is listed without a screen. Its vendor description specifies a numpad with a knob, but does not describe a calculator display or calculator mode.
Redragon lists five noise-dampening layers for the COVE K733, including 3.5 mm PO foam, IXPE switch foam, a PET sound pad, bottom socket foam, and a silicone bottom pad. The product also has a silicone gasket as part of its gasket mount design.
The COVE K733 is listed as pre-built, with a wired connection and wireless modes. The GMK21 is listed as a DIY kit or barebones product, so it is aimed at buyers who want to build a numpad setup.
Not sold on either?
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