MMD KM21 Ultra vs KEEBD Reviung 5Wireless vs DIY
Choose the MMD KM21 Ultra for a ready-to-use wireless, hot-swappable macropad, or the KEEBD Reviung 5 for a smaller DIY build.
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Which one should you get?
Get the
MMD KM21 Ultra
Wireless
Build quality in the top 15% of Numpad boards under $100.
- CNC-machined aluminum case with a top-mount structure.
- Four clickable knobs alongside 17 hot-swappable keys.
- USB-C, 2.4 GHz and Bluetooth connectivity with a 980 mAh battery.
Get the
KEEBD Reviung 5
DIY
Build quality in the bottom 10% of Numpad boards under $50.
- DIY kit includes a Reviung 5 PCB, acrylic switch plate and acrylic bottom plate.
- Five-key macropad design can be built with an optional rotary encoder.
- The kit includes a tactile switch, diodes, standoffs, screws and rubber feet.
- Switches are soldered. Swapping them means soldering.
Pick the MMD KM21 Ultra if you want a complete numpad with four knobs, three connection options and solder-free switch changes. Choose the KEEBD Reviung 5 if you prefer assembling a DIY kit and are comfortable sourcing the required controller, switches and keycaps, with soldering needed to swap switches.
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
KEEBD Reviung 5
Hot-swappable
Yes
No
Switch changes without soldering
Case material
Aluminum
Acrylic
QMK
Yes
No
The deep option when you want to remap every key
VIA
Yes
No
GUI remapping without compiling firmware
Sound dampening
Yes
No
- MMD KM21 Ultra
- KEEBD Reviung 5
- Performance
- 6646
- Build quality
- 8140
- Productivity
- 8945
- Customizability
- 8969
- Portability
- 8562
- Layout size: Numpad
- Knob
What will you mostly use it for?
The KM21 Ultra leads for office use, programming, travel and content creation because it combines a ready-built 17-key pad with wireless connectivity and configurable knobs. It is also the more immediately usable gaming companion, with wired and wireless connection options. Modding is a closer call: the MMD offers solder-free switch changes, while the Reviung is a kit intended for assembly. Choose the Reviung when building from components is the priority rather than plug-in convenience.
Pick the MMD KM21 Ultra
- KM21 Ultra supports wired USB-C and 2.4 GHz wireless connections.
- Its QMK/VIA support and four clickable knobs can be configured for shortcuts and controls.
MMD KM21 Ultra vs KEEBD Reviung 5 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
9 of 19 specs differ
MMD KM21 Ultra
KEEBD Reviung 5
Switch options
Hot-swappable
Mount style
Sound dampening
Layout size
Layout standard
Ergonomics
Knob
Display
Connection
Battery
USB-C
Case material
Plate material
Backlight
QMK
VIA
Mac & Windows
Released
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MMD KM21 Ultra vs KEEBD Reviung 5: your questions
The KM21 Ultra is a pre-built numpad with 17 hot-swap keys, four clickable knobs and wireless connectivity. The Reviung 5 is a five-key DIY kit that requires additional parts to complete.
Yes, the KM21 Ultra supports Bluetooth and 2.4 GHz wireless, as well as wired USB-C. It has a 980 mAh battery for wireless use.
No, the Reviung 5 is a DIY kit. Its listed required components include a Pro Micro controller, MX switches and MX keycaps.
Yes, the KM21 Ultra has hot-swap sockets for its switches. The vendor lists the board as pre-installed with MMD Cream linear switches.
The Reviung 5's switches are soldered, so changing them requires soldering. The kit description lists an optional EZ-Solder Header to enable controller hot-swap, which is distinct from hot-swapping switches.
The KM21 Ultra has four clickable rotary knobs. The Reviung 5 is a five-key macropad, or a four-key build with a rotary encoder.
Yes, the KM21 Ultra lists both QMK and VIA support. The vendor says its keys and knobs can be configured through VIA.
The KM21 Ultra has an aluminum case and a plastic plate, with the vendor describing CNC-machined aluminum and multiple damping layers. The Reviung 5 kit includes acrylic switch and bottom plates, plus an acrylic controller cover.
The KM21 Ultra is the option with wireless connectivity, offering Bluetooth and 2.4 GHz alongside USB-C. The Reviung 5 product description does not list wireless connectivity.
No, the kit lists a Pro Micro controller, MX switches and MX keycaps as required items. An encoder and encoder knob are optional if you want to add rotary control.
The KM21 Ultra offers four clickable knobs that can be assigned to controls, and it supports QMK/VIA configuration. The Reviung 5 can be built with an optional encoder, but its kit layout is limited to five keys or four keys with that encoder.
Not sold on either?
![[In Stock] Lelepad Custom Numpad/Macropad Hotswappable Keyboard - Image: 3](https://cdn.shopify.com/s/files/1/1674/0405/files/DSC06205.jpg?v=1736839891&width=3840&quality=75)
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