Compare Feker JJK21 vs KEEBD Reviung 5 Differences Side by Side

This comparison is for users deciding between two small, DIY-focused keyboard kits with different core purposes. The Feker JJK21 is a fully-featured numpad, while the KEEBD Reviung 5 is a minimalist macro pad. The decision hinges on whether you need a numeric keypad with modern features or a tiny, customizable controller for specific shortcuts.

Model
	76		Select a keyboard to compare
Rating	2.8 stars (10 reviews)	0.0 stars (0 reviews)
Purchase Options
Main differences	Released in 2022 Supports hot-swappable switches Connects via USB-C Features N-key rollover Has built-in sound dampening Uses a Gasket Mount mounting style Supports Bluetooth, 2.4 GHz, Wired, Wireless connectivity Equipped with a 1500 mAh battery Weighs about 300 g Made with a Plastic case	Released in 2021 Has Tactile switch options Made with a Acrylic case
Score	Scores Performance: 76.4 Build Quality: 75.2 Productivity: 73.2 Customizability: 80.2 Portability: 86.2	Scores Performance: 44.3 Build Quality: 40.1 Productivity: 44.1 Customizability: 69 Portability: 61.7
Name	Name Feker JJK21	Name KEEBD Reviung 5
Release year	Release year 2022	Release year 2021
Switch Options	Switch Options -	Switch Options Tactile
Profile	Profile Normal Profile	Profile Normal Profile
Hot Swappable	Hot Swappable	Hot Swappable
Layout Size	Layout Size Numpad	Layout Size Numpad
Layout Standard	Layout Standard ANSI	Layout Standard ANSI
Layout Ergonomics	Layout Ergonomics Normal	Layout Ergonomics Normal
Knob Support	Knob Support	Knob Support
Display Support	Display Support	Display Support
Mac/Win Support	Mac/Win Support	Mac/Win Support
Multi-Media Keys	Multi-Media Keys	Multi-Media Keys
USB-C	USB-C	USB-C
USB passthrough	USB passthrough	USB passthrough
Connection	Connection Bluetooth, 2.4 GHz, Wired, Wireless	Connection
Polling Rate	Polling Rate -	Polling Rate -
Battery capacity	Battery capacity 1500 mAh	Battery capacity -
Hall Effect Support	Hall Effect Support	Hall Effect Support
QMK Support	QMK Support	QMK Support
VIA Support	VIA Support	VIA Support
VIAL Support	VIAL Support	VIAL Support
N-Key Rollover	N-Key Rollover	N-Key Rollover
Rapid Trigger	Rapid Trigger	Rapid Trigger
Mount Style	Mount Style Gasket Mount	Mount Style -
Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers
Sound Dampening	Sound Dampening	Sound Dampening
Backlight	Backlight Rgb	Backlight Rgb
Case Colors	Case Colors	Case Colors
Case Material	Case Material Plastic	Case Material Acrylic
Keycaps Material	Keycaps Material -	Keycaps Material -
Dimensions	Dimensions -	Dimensions -
Weight	Weight 300g	Weight -

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Pros and Trade-offs

The Feker JJK21 is the recommended choice for nearly all users seeking a functional, modern numpad. It is a complete wireless solution out of the box. Only consider the KEEBD Reviung 5 if your goal is a bare-bones, ultra-low-cost soldering project for a minimalist macro pad, and you are willing to source multiple additional components.

Feker JJK21

+Offers tri-mode connectivity: Bluetooth, 2.4GHz wireless, and wired USB-C.
+Includes a 1500mAh battery for cordless operation.
+Features a gasket mount design with a PC plate and pre-installed sound-dampening foams.
+Hot-swappable PCB supports both 3-pin and 5-pin switches.
+Comes with stabilizers, a cable, and a 2.4G dongle in the kit.

−Some user reviews note an automatic sleep mode in wireless modes that can cause a missed first keystroke.
−The software is described by a reviewer as 'a little basic'.
−Build requires sourcing your own switches and keycaps, as it is a kit.

KEEBD Reviung 5

+Extremely low cost for a DIY project.
+Open-source design with publicly available firmware.
+Acrylic case and plate materials for a translucent aesthetic.
+Kit includes a through-hole tactile switch for the encoder function.

−Lacks wireless connectivity, battery, or a USB port; requires a separate Pro Micro controller.
−Only provides 4-5 keys, limiting its utility as a standalone input device.
−No hot-swap sockets; switches must be soldered.
−The kit does not include keycaps, switches (beyond one tactile switch), or a controller.

Which Keyboard Is Better for Your Needs?

The Feker JJK21 is the clear choice for most practical applications, winning in office, programming, travel, and content creation due to its numpad layout, wireless features, and programmability. It also takes the lead for gaming thanks to its anti-ghosting and low-latency wireless options. The two kits tie only in the niche area of modding, where the Reviung 5's through-hole, open-source build offers a distinct experience from the JJK21's more modern, foam-included construction.

GamingFeker JJK21

•The Feker JJK21 offers full N-key rollover for simultaneous key presses.
•It provides multiple connectivity options, including a 2.4GHz wireless dongle for low-latency input.
•The vendor description mentions programmable software for setting macros.

OfficeFeker JJK21

•The Feker JJK21's 21-key numpad layout is designed for data entry and calculations.
•Its tri-mode connectivity (Bluetooth, 2.4GHz, wired) offers flexibility for different desk setups.
•It includes a knob for convenient media control, as stated in the vendor description.

ProgrammingFeker JJK21

•The Feker JJK21's programmable software allows for custom layers and shortcuts.
•Its hot-swappable PCB supports a wide variety of switches for personalized feel.
•The numpad layout can be repurposed for coding macros or navigation commands.

TravelFeker JJK21

•The Feker JJK21 has a built-in 1500mAh battery for wireless use.
•It supports Bluetooth connectivity for pairing with laptops on the go.
•At 300g, it is a portable accessory, though both kits are small.

ModdingTie

•Both are sold as DIY kits requiring assembly.
•The Feker JJK21 features a gasket mount, PC plate, and included sound-dampening foams.
•The KEEBD Reviung 5 uses an open-source design and through-hole components, appealing to a different modding style.

Content CreationFeker JJK21

•The Feker JJK21's knob is explicitly noted for media control in its description.
•Programmable keys can be mapped to editing software shortcuts.
•Wireless connectivity reduces cable clutter on a production desk.