Feker JJK21 vs Weikav Stars21 Programmable NumpadBudget Plastic vs Premium Aluminum Numpad
Choose the Feker JJK21 for a lighter, more portable kit with a larger battery, or the Weikav Stars21 for a premium aluminum build with advanced QMK/VIA programmability.
![[In Stock] Stars21 Programmable Mechanical Numpad](https://cdn.shopify.com/s/files/1/0549/0262/0278/files/0000_ec55349a-00a4-4b82-8d05-760c94529d10.jpg?v=1735897191&width=3840&quality=75)
Which one should you get?
Get the
Feker JJK21
Budget Plastic
- Includes a programmable knob for media or application control.
- Larger 1500mAh battery for potentially longer wireless use.
- Lighter weight (300g) enhances portability.
- Plastic case construction may feel less premium than aluminum.
- Uses proprietary configuration software, not QMK/VIA.
- Some user reviews note an automatic sleep mode in wireless modes that can cause a missed first keystroke.
Get the
Weikav Stars21 Programmable Numpad
Premium Aluminum Numpad
- CNC aluminum case with anodized or electrophoretic finish for a premium build.
- Full support for QMK and VIA open-source firmware and remapping software.
- Explicitly lists a 1000Hz polling rate for wired and 2.4GHz modes.
- Smaller 800mAh battery capacity.
- Substantially heavier at 480g, reducing portability.
- No mention of an included knob or dedicated media control.
Select the Weikav Stars21 if your priority is a durable, aluminum-bodied numpad with the extensive customization offered by QMK and VIA firmware. Opt for the Feker JJK21 if you value a lighter, more portable kit with a larger battery, included knob, and pre-installed sound dampening at a likely lower cost. The core trade-off is between advanced programmability and practical, everyday features.
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
Weikav Stars21 Programmable Numpad
Battery
1,500 mAh
800 mAh
Case material
Plastic
Aluminum
Knob
Yes
No
Weight
300 g
480 g
QMK
No
Yes
- Feker JJK21
- Weikav Stars21 Programmable Numpad
- Performance
- 7776
- Build quality
- 7584
- Productivity
- 7457
- Customizability
- 8089
- Portability
- 8678
- Layout size: Numpad
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Mount style: Gasket Mount
What will you mostly use it for?
The Weikav Stars21 is the clear choice for programming and serious modding due to its QMK/VIA support. The Feker JJK21 wins for office use, travel, and content creation, thanks to its included knob, lighter weight, and larger battery. For gaming, the specs are closely matched, making it a tie. Your primary need for either advanced programmability or practical, portable features will dictate the winner.
It's a tie
- Both offer N-Key Rollover for simultaneous key presses.
- Both support a 2.4 GHz wireless mode for reduced latency.
- The Weikav lists a 1000Hz polling rate for its wired and 2.4GHz modes, a spec not explicitly stated for the Feker.
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
Feker JJK21
10 owner reviews
“This numpad has been one of my favorite recent purchases. The wireless is very snappy and painless to pair. I use it to pull out when I need to enter a lot of numbers for work but then put it away for playing games. Its a great little addition and it even has…”
“キーを打つ度にドンドンと机を叩くような低い音が響くので、柔らかいリストレストの上に置いて使っています。 ライティングの設定は、しばらく続けるとなぜか変更を受け付けなくなるので、その度にリセット(多分Fn+Esc長押し)を押しています。 Windowsを起動した直後にpinを入れるためにキーを押しても反応が鈍く、入力をやり直す機会が増えたことも不満です。 追記 接続は、PC側もUSB-Cで繋ぐと安定しました。 ライティングを点滅させるとNumランプも一緒に点滅するので視認性が悪いです。…”
Weikav Stars21 Programmable Numpad
No owner reviews collected yet.
Feker JJK21 vs Weikav Stars21 Programmable Numpad specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
9 of 22 specs differ
Feker JJK21
Weikav Stars21 Programmable Numpad
Switch options
Hot-swappable
Mount style
Sound dampening
Layout size
Layout standard
Ergonomics
Knob
Display
Connection
Max polling rate
Battery
USB-C
Case material
Plate material
Weight
Dimensions
Backlight
QMK
VIA
N-key rollover
Released
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Feker JJK21 vs Weikav Stars21 Programmable Numpad: your questions
The Weikav Stars21 supports QMK and VIA, which are open-source, community-driven firmware and GUI tools allowing for deep customization of layers, macros, and key functions. The Feker JJK21 uses proprietary software from the manufacturer, which may be more limited in scope.
Yes. The vendor description and product title for the Feker JJK21 specify it is a "Numpad DIY Kit with Knob." The knob is present and can be programmed via its software.
Yes, significantly. The Weikav Stars21 weighs 480 grams, while the Feker JJK21 weighs 300 grams. This 180-gram difference is due to the Weikav's aluminum case and internal metal weight.
Based on battery capacity alone, the Feker JJK21 has a larger 1500mAh battery compared to the Weikav Stars21's 800mAh battery. This suggests the Feker should last longer between charges, though actual runtime depends on usage patterns and RGB settings.
Yes. Both the Feker JJK21 and Weikav Stars21 feature hot-swappable PCBs. The Feker's listing specifies it supports both 3-pin and 5-pin mechanical switches.
The Feker JJK21 uses a plastic case and a polycarbonate (PC) mounting plate. The Weikav Stars21 uses a CNC-machined aluminum case with surface treatments like anodizing or electrophoresis.
Yes. Both the Feker JJK21 and Weikav Stars21 are listed with RGB backlighting. The Weikav's specifications note it supports 16 million colors.
Both numpads offer triple-mode connectivity: wired via USB-C, 2.4 GHz wireless with a dongle, and Bluetooth. The Feker's vendor page specifies Bluetooth 5.0.
According to its specifications, the Weikav Stars21 has a 1000Hz polling rate when used in wired or 2.4GHz wireless mode. In Bluetooth mode, the polling rate is 125Hz.
The Feker JJK21 may be more beginner-friendly. It is a complete kit that includes stabilizers, foam, and a knob, and its proprietary software might be simpler to initially configure than QMK. Its lower weight and price also make it a less committing first purchase.
For the Feker JJK21, the vendor listing confirms the kit includes stabilizers. The listing for the Weikav Stars21 does not specify whether stabilizers are included, so you may need to verify with the seller or purchase them separately.
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