MelGeek Mojopad Numpad vs MMD KM21 Ultra
Choose the MMD KM21 Ultra for four programmable knobs and QMK/VIA, or the MelGeek Mojopad for its larger battery and tactile or clicky switch options.
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Which one should you get?
Get the
MelGeek Mojopad Numpad
Battery
Build quality in the top 40% of Numpad boards under $100.
- 2500mAh battery, larger than the KM21 Ultra's listed 980mAh battery.
- Gasket mount design with silicone and Poron sound-absorbing pads, according to MelGeek's vendor listing.
- Tactile and clicky switch types are listed in the product metadata.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
Get the
MMD KM21 Ultra
Knob
Build quality in the top 15% of Numpad boards under $100.
- Four clickable knobs alongside 17 hot-swap keys, as listed by the vendor.
- QMK and VIA support for configuring its controls.
- CNC-machined aluminum case and top-mount construction.
Pick the MMD KM21 Ultra if programmable knobs, QMK/VIA, and an aluminum case matter most, especially for shortcuts or creative controls. Choose the MelGeek Mojopad if you prefer tactile or clicky switch options or prioritize its 2500mAh battery. Check the Mojopad's south-facing LED compatibility rule if you plan to use shine-through or 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.
MelGeek Mojopad Numpad
MMD KM21 Ultra
Connection
2.4 GHz, Wired
Bluetooth, 2.4 GHz, Wired
Wireless for several devices and wired for lower latency
Battery
2,500 mAh
980 mAh
A larger battery means fewer cables during the day
Case material
ABS, Plastic
Aluminum
Mount style
Gasket Mount
Top Mount
Knob
No
Yes
- MelGeek Mojopad Numpad
- MMD KM21 Ultra
- Performance
- 5666
- Build quality
- 7181
- Productivity
- 8089
- Customizability
- 7589
- Portability
- 8985
- Layout size: Numpad
- Hot-swappable
- Sound dampening
- Plate material: Plastic
What will you mostly use it for?
The KM21 Ultra leads for programmable workflows and content controls, primarily because its four clickable knobs work alongside QMK/VIA support. It also has the broader stated connection options, with Bluetooth in addition to USB-C and 2.4 GHz. The Mojopad is the more battery-focused pick, and its tactile or clicky switch options distinguish it for buyers with a specific switch preference. Both are hot-swappable wireless numpads, but their mounts and case materials differ.
Pick the MMD KM21 Ultra
- The KM21 Ultra has QMK/VIA support and four clickable knobs that can be assigned as controls.
- It offers wired USB-C, 2.4 GHz, and Bluetooth connectivity.
- The Mojopad lists tactile and clicky switches, which may better suit buyers who specifically want those switch types.
MelGeek Mojopad Numpad vs MMD KM21 Ultra specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
11 of 22 specs differ
MelGeek Mojopad Numpad
MMD KM21 Ultra
Switch options
Hot-swappable
Mount style
Sound dampening
Screw-in stabilizers
Layout size
Layout standard
Ergonomics
Knob
Display
Media keys
Connection
Battery
USB-C
Case material
Plate material
Keycaps
Backlight
QMK
VIA
Mac & Windows
Released
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MelGeek Mojopad Numpad vs MMD KM21 Ultra: your questions
The KM21 Ultra has four clickable knobs, QMK/VIA support, Bluetooth connectivity, and an aluminum case. The Mojopad has a 2500mAh battery and lists tactile and clicky switch types.
Yes, its vendor description specifies four clickable knobs that can be configured through VIA. The listing gives examples including volume, zoom, and timeline scrubbing.
No, MelGeek's vendor listing marks the Mojopad as not QMK- or VIA-compatible. It describes programming through the MelGeek KBTools app instead.
The MelGeek Mojopad lists a 2500mAh battery, while the MMD KM21 Ultra lists 980mAh. These figures describe capacity, not a guaranteed runtime.
The KM21 Ultra lists Bluetooth alongside wired USB-C and 2.4 GHz connectivity. The Mojopad lists wired USB-C and 2.4 GHz, but not Bluetooth.
Yes, both products list hot-swappable switches. The KM21 Ultra vendor says its switches can be changed without soldering.
The KM21 Ultra is the more directly equipped option, with four clickable knobs and QMK/VIA support. Its vendor describes using knobs for controls such as volume, zoom, and timeline scrubbing.
The Mojopad lists a plastic and ABS case, while the KM21 Ultra lists an aluminum case. The KM21 Ultra vendor describes its case as CNC-machined aluminum.
The Mojopad has south-facing LEDs. Its compatibility note warns that shine-through legends stay dark and some sculpted keycaps can clip the LED.
The KM21 Ultra vendor says it comes preinstalled with MMD Cream linear switches and keycaps. Its hot-swap sockets allow switches to be replaced without soldering, according to the listing.
The KM21 Ultra has four clickable knobs, according to its vendor listing. The Mojopad's listed features do not include knobs.
Not sold on either?
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