Feker JJK21 vs Keychron Lemokey X4 Specs

Compare Feker JJK21 vs Keychron Lemokey X4 Differences Side by Side

Explore the comprehensive side-by-side comparison of the Feker JJK21 and Keychron Lemokey X4 and view their biggest differences. The detailed comparison table allows you to see all the essential features, specifications, and benefits of each keyboard at a glance. Whether you're looking for performance, value, or specific functionalities, this comparison tool helps you make an informed decision.

Model
Rating	2.8 stars (10 reviews)	0.0 stars (0 reviews)
Purchase Options
Main differences	Released in 2022 Available in a Numpad layout Supports Bluetooth, 2.4 GHz, Wired, Wireless connectivity Equipped with a 1500 mAh battery Weighs about 300 g Made with a Plastic case Offers Yes, Rgb RGB lighting	Released in 2024 Has Linear, Tactile, Clicky switch options Available in a 75% layout Compatible with both Mac and Windows Supports QMK firmware Includes screw-in stabilizers Supports Wired, Wired only connectivity Runs at a 1000 Hz polling rate Weighs about 712 g Sized at 41 x 325 x 145 mm Made with a ABS, Plastic case Features ABS, PBT keycaps Offers Yes, South-face, North-face RGB lighting
Score	Scores Performance: 76.5 Build Quality: 75.5 Productivity: 74.4 Customizability: 80.5 Portability: 86.5	Scores Performance: 73.9 Build Quality: 81.6 Productivity: 94.8 Customizability: 82.8 Portability: 65.2
Name	Name Feker JJK21	Name Keychron Lemokey X4
Release year	Release year 2022	Release year 2024
Switch Options	Switch Options -	Switch Options Linear, Tactile, Clicky
Profile	Profile Normal Profile	Profile Normal Profile
Hot Swappable	Hot Swappable	Hot Swappable
Layout Size	Layout Size Numpad	Layout Size 75%
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 Wired, Wired only
Polling Rate	Polling Rate -	Polling Rate 1000 Hz
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 Gasket Mount
Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers
Sound Dampening	Sound Dampening	Sound Dampening
Backlight	Backlight Rgb	Backlight South-face, North-face
Case Colors	Case Colors	Case Colors
Case Material	Case Material Plastic	Case Material ABS, Plastic
Keycaps Material	Keycaps Material -	Keycaps Material ABS, PBT
Dimensions	Dimensions -	Dimensions 41 x 325 x 145 mm
Weight	Weight 300g	Weight 712g

FEKER JJK21 Numpad DIY Kit with Knob - Image: 3

Lemokey X4 QMK Wired Mechanical Keyboard

Select a keyboard to compare

2.8 stars (10 reviews)

0.0 stars (0 reviews)

Released in 2022
Available in a Numpad layout
Supports Bluetooth, 2.4 GHz, Wired, Wireless connectivity
Equipped with a 1500 mAh battery
Weighs about 300 g
Made with a Plastic case
Offers Yes, Rgb RGB lighting

Released in 2024
Has Linear, Tactile, Clicky switch options
Available in a 75% layout
Compatible with both Mac and Windows
Supports QMK firmware
Includes screw-in stabilizers
Supports Wired, Wired only connectivity
Runs at a 1000 Hz polling rate
Weighs about 712 g
Sized at 41 x 325 x 145 mm
Made with a ABS, Plastic case
Features ABS, PBT keycaps
Offers Yes, South-face, North-face RGB lighting

Scores

Performance: 76.5
Build Quality: 75.5
Productivity: 74.4
Customizability: 80.5
Portability: 86.5

Scores

Performance: 73.9
Build Quality: 81.6
Productivity: 94.8
Customizability: 82.8
Portability: 65.2

Name

Feker JJK21

Name

Keychron Lemokey X4

Release year

2022

Release year

2024

Switch Options

Linear, Tactile, Clicky

Profile

Normal Profile

Profile

Normal Profile

Hot Swappable

Layout Size

Numpad

Layout Size

75%

Layout Standard

ANSI

Layout Standard

ANSI

Layout Ergonomics

Normal

Layout Ergonomics

Normal

Knob Support

Display Support

Mac/Win Support

Multi-Media Keys

USB-C

USB passthrough

Connection

Bluetooth, 2.4 GHz, Wired, Wireless

Connection

Wired, Wired only

Polling Rate

1000 Hz

Battery capacity

1500 mAh

Battery capacity

Hall Effect Support

QMK Support

VIA Support

VIAL Support

N-Key Rollover

Rapid Trigger

Mount Style

Gasket Mount

Mount Style

Gasket Mount

Screw in Stabilizers

Sound Dampening

Backlight

Rgb

Backlight

South-face, North-face

Case Colors

Case Material

Plastic

Case Material

ABS, Plastic

Keycaps Material

ABS, PBT

Dimensions

41 x 325 x 145 mm

Weight

300g

Weight

712g

Discover similar products

You might also like similar products in that price range:

$39

Epomaker EK21

Numpad,

Hotswap,

Wireless,

Wired,

RGB,

Knob,

VIA,

Gasket Mount

$39

Keychron V4

60%,

Hotswap,

Wired,

RGB,

Knob,

VIA,

QMK,

Tray Mount

$35

Zuoya GMK21 Numpad

Numpad,

Hotswap,

RGB,

Knob,

VIA,

QMK

$34

Lemokey X1 QMK/VIA Wired Mechanical Keyboard

Keychron Lemokey X1

80%,

Hotswap,

Wired,

Backlight,

VIA,

QMK,

Tray Mount

$44

Keychron V6

100%,

Hotswap,

Wired,

RGB/ White LEDs,

Knob,

VIA,

QMK,

Tray Mount

$40

Keychron C3 Pro

80%,

Hotswap,

Wired,

RGB,

VIA,

QMK,

Gasket Mount

$44

Keychron V1

75%,

Hotswap,

Wired,

RGB/ White LEDs,

Knob,

VIA,

QMK,

Tray Mount

100

$160

Keychron Q1 HE

75%,

Hotswap,

Wireless,

Wired,

RGB/ White LEDs,

Knob,

VIA,

QMK,

HE,

Rapid trigger,

Alu case,

Gasket Mount

$35

Lelelab LeleDesign Leee

Numpad,

Hotswap,

Screen,

RGB

$129

Keychron K2 HE

75%,

Hotswap,

Wireless,

Wired,

RGB/ White LEDs,

Knob,

VIA,

QMK,

HE,

Rapid trigger,

Alu case,

Tray Mount