Feker JJK21 vs Yunzii AL21DIY Kit or Aluminum
Choose the Feker JJK21 for a lighter DIY kit with a PC mounting plate, or the Yunzii AL21 for its aluminum case, PBT keycaps, and prebuilt linear switches.
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2.8 (10)2.8 · 10 reviews
from$39at WhatGeek
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from$49at Yunzii
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Which one should you get?
Get the
Feker JJK21
Build quality in the top 25% of Numpad boards under $50.
- DIY kit/barebones format with a PC mounting plate.
- 300g listed weight.
Get the
Yunzii AL21
Mac & Windows
Build quality in the top 15% of Numpad boards under $50.
- CNC aluminum case and PBT keycaps.
- Prebuilt linear switches.
- South-facing RGB lighting.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
Get the Feker JJK21 if you want a DIY numpad kit with a PC mounting plate and lower listed weight. Choose the Yunzii AL21 for its CNC aluminum case, PBT keycaps, and prebuilt linear switches, and keep its south-facing LED keycap limitation in mind.
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.
Feker JJK21
Yunzii AL21
Case material
Plastic
Aluminum
Weight
300 g
458 g
Heavier boards stay planted and lighter ones travel
Backlight
RGB
RGB, south-facing
RGB for looks and low light rather than speed
Mac & Windows
No
Yes
Released
2022
2026
- Feker JJK21
- Yunzii AL21
- Performance
- 7675
- Build quality
- 7477
- Productivity
- 7484
- Customizability
- 8074
- Portability
- 8689
- Layout size: Numpad
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Battery: 1,500 mAh
- Mount style: Gasket Mount
- Knob
What will you mostly use it for?
The AL21 is the more complete choice for office use and content workflows, thanks to its prebuilt linear switches, named Mac/Win support, aluminum case, and configurable knob functions. The JJK21 takes the travel and modding picks on its lower listed weight and DIY-kit format. Gaming favors the AL21 for its prebuilt switches, while both boards list N-Key Rollover. Both are compact numpads with tri-mode connectivity, so neither has a clear advantage on those shared basics.
Pick the Yunzii AL21
- The AL21 comes prebuilt with linear switches, while the JJK21 is a DIY kit.
- The AL21 supports N-Key Rollover and has south-facing RGB lighting.
Feker JJK21 vs Yunzii AL21 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
5 of 21 specs differ
Feker JJK21
Yunzii AL21
Switch options
Hot-swappable
Mount style
Sound dampening
Layout size
Layout standard
Ergonomics
Knob
Display
Connection
Battery
USB-C
Case material
Plate material
Keycaps
Weight
Dimensions
Backlight
N-key rollover
Mac & Windows
Released
Compare prices
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Feker JJK21 vs Yunzii AL21: your questions
The JJK21 is listed as a DIY kit/barebones numpad and its vendor description specifies a PC mounting plate. The AL21 is prebuilt with linear switches and has an aluminum case with PBT keycaps.
Both list Bluetooth, 2.4 GHz, and wired connectivity. Each has a 1500mAh battery.
The Feker JJK21 is listed at 300g, while the Yunzii AL21 is listed at 458g. That makes the JJK21 the lighter option based on their listed weights.
The AL21 is listed as prebuilt with linear switches, and its product description names YUNZII Cocoa Cream V2 Linear Switches. Its listed keycaps are dye-sublimation PBT in Cherry profile.
The JJK21 is listed as a DIY kit/barebones product. Its vendor description identifies a kit containing a case, PCB, foam, stabilizers, positioning plate, and battery.
Both boards list hot-swap support. The JJK21 vendor description specifies support for 3-pin and 5-pin switches, and the AL21 product description specifies full-key hot-swap sockets for those switch types.
Both list knob support. Yunzii says the AL21 knob can control volume or RGB brightness and can act as an ESC key.
The AL21 lists Mac/Win support, and its vendor description also names Windows and macOS customization. The JJK21 vendor description specifies Windows system support.
The AL21 has south-facing RGB LEDs. Its compatibility note says shine-through legends stay dark, and some sculpted keycaps may clip the LEDs.
The JJK21 is explicitly a DIY kit/barebones numpad, and its vendor description identifies a PC mounting plate. Both boards list hot-swap support for 3-pin and 5-pin switches.
Yes, N-Key Rollover is listed for both the Feker JJK21 and Yunzii AL21. The JJK21 vendor description also calls its anti-ghosting full key.
The JJK21 has the lower listed weight at 300g, while the AL21 is listed at 458g. Both have a 1500mAh battery and Bluetooth, 2.4 GHz, and wired connection options.
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