MMD KM21 Ultra vs Meletrix ZoomPad TIGAKnobs vs DIY
Choose the KM21 Ultra for its four clickable knobs and ready-to-use build, or the ZoomPad TIGA for its DIY options and Hall Effect feature.
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from$89at MonacoKeys
from$100at MK
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Which one should you get?
Get the
MMD KM21 Ultra
Knobs
Build quality in the top 15% of Numpad boards under $100.
- Four clickable, reassignable knobs provide controls beyond the 17 hot-swap keys.
- Ships pre-built with MMD Cream linear switches and keycaps.
- 980mAh battery and Bluetooth, 2.4 GHz, and USB-C wired connectivity.
Get the
Meletrix ZoomPad TIGA
DIY
Build quality in the top 10% of Numpad boards under $150.
- CNC aluminum case with top-mount and silica gel mount assembly options described by the vendor.
- Plate choices include polycarbonate, aluminum, FR4, POM, and plastic.
- QMK/VIA support, RGB, and Bluetooth, 2.4 GHz, and USB-C wired connectivity.
- Magnetic switches only. Standard MX switches will not fit.
- North-facing LEDs. Cherry-profile keycaps can hit the switch housing.
Choose the MMD KM21 Ultra if you want a pre-built numpad with four clickable knobs, included switches and keycaps, and a larger stated battery. Choose the Meletrix ZoomPad TIGA if selecting plate and assembly options is more important, and you are prepared for a DIY build with compatible magnetic switches. Check the TIGA's switch-socket and keycap compatibility rules before buying.
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.
MMD KM21 Ultra
Meletrix ZoomPad TIGA
Hall effect (magnetic)
No
Yes
Adjustable actuation helps in games and not in normal typing
Battery
980 mAh
600 mAh
A larger battery means fewer cables during the day
Mount style
Top Mount
Plate Mount, Top Mount
Knob
Yes
No
Plate material
Plastic
Aluminum, FR4, Plastic, Polycarbonate, POM
- MMD KM21 Ultra
- Meletrix ZoomPad TIGA
- Performance
- 6683
- Build quality
- 8183
- Productivity
- 8985
- Customizability
- 8994
- Portability
- 8588
- Layout size: Numpad
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Case material: Aluminum
- QMK
- VIA
What will you mostly use it for?
The KM21 Ultra is the more convenient choice for office and creative workflows, thanks to its pre-built setup and four knobs. The ZoomPad TIGA has the edge for hands-on customization, with several plate choices and assembly options, and it lists Hall Effect as a feature for gaming use. Both support QMK, VIA, and three connection modes, so programming flexibility and connection choice are shared strengths. For wireless travel, the KM21 Ultra has the larger stated battery.
Pick the Meletrix ZoomPad TIGA
- The ZoomPad TIGA lists Hall Effect among its features.
- Its hot-swap sockets are specified for magnetic switches only, so standard MX switches will not fit.
MMD KM21 Ultra vs Meletrix ZoomPad TIGA specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
9 of 23 specs differ
MMD KM21 Ultra
Meletrix ZoomPad TIGA
Switch options
Hall effect (magnetic)
Hot-swappable
Mount style
Sound dampening
Layout size
Layout standard
Ergonomics
Knob
Display
Media keys
Connection
Battery
USB-C
Case material
Plate material
Typing angle
Backlight
QMK
VIA
N-key rollover
Mac & Windows
Released
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MMD KM21 Ultra vs Meletrix ZoomPad TIGA: your questions
The KM21 Ultra is sold pre-built with switches and keycaps and has four clickable knobs. The ZoomPad TIGA is a DIY barebones kit that does not include switches or keycaps.
Yes. The vendor says it comes pre-built with MMD Cream linear switches and keycaps installed.
No. Its vendor listing describes it as a barebones DIY kit without switches or keycaps, and says assembly is required.
No. The ZoomPad TIGA's compatibility rules specify magnetic switches only, and standard MX switches will not fit.
The TIGA has north-facing LEDs, and its compatibility rules warn that Cherry-profile keycaps can hit the switch housing. Consider that limitation when choosing keycaps.
The MMD KM21 Ultra has a 980mAh battery, while the Meletrix ZoomPad TIGA has a 600mAh battery. The stated capacities do not specify how long either board runs between charges.
Yes. Both list Bluetooth and 2.4 GHz wireless, as well as wired connectivity. The KM21 Ultra vendor description identifies its wired connection as USB-C.
Yes. Both product listings specify QMK and VIA support, making them options for buyers who want to customize key assignments.
The KM21 Ultra has four clickable knobs that its vendor describes for uses such as timeline scrubbing, zoom, and volume. The vendor also says the knobs can be assigned through VIA.
The ZoomPad TIGA listing names polycarbonate, aluminum, FR4, POM, and plastic plate options. Its vendor description says buyers select a plate material when completing the kit.
The MMD KM21 Ultra is listed as pre-built and the vendor says its switches and keycaps are already installed. The ZoomPad TIGA is a DIY kit that requires assembly and separate switches and keycaps.
Hall Effect is listed as a feature for the ZoomPad TIGA. Its compatibility rules specify magnetic switches only, so standard MX switches are not an option.
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