Can I customize the layout of the KB40 keyboard?

Yes, the KB40 offers multiple layout options including staggered and ortholinear configurations, allowing users to choose between different row and column arrangements to best suit their typing preferences and ergonomic needs.

Is the keyboard compatible with both MX and electro-capacitive switches?

The KB40 supports hot-swappable MX switches on all PCB variants, and the wireless PCB variant is compatible with both MX and electro-capacitive switches, giving you flexibility to tailor the typing experience to your liking.

Does the KB40 support wireless connectivity?

Yes, certain versions of the KB40 come with a wireless PCB that supports 2.4GHz connectivity. However, to enable wireless functionality, you will need to purchase the 2.4GHz dongle separately.

What materials are used in the construction of the KB40 keyboard frame?

The KB40 features a robust aluminum top and bottom frame, providing a solid build quality with enhanced durability and a premium feel. This metal construction also helps reduce flex and improves overall typing stability.

Are the key switches on the KB40 hot-swappable?

Yes, all KB40 PCBs support hot-swappable switches, allowing you to easily remove and replace switches without soldering. This makes it convenient to customize or upgrade your keyboard switches.

Does the keyboard come with sound-dampening materials like foam or O-rings?

The KB40 kit includes gasket tadpoles and O-rings which help to reduce noise and soften keypresses. However, additional foam sets are not included and need to be purchased separately if you want to further enhance sound dampening.

What kind of batteries does the wireless KB40 use?

The wireless model of the KB40 is powered by lithium batteries that come included with the keyboard, providing reliable power for your wireless typing sessions.

Can I use the KB40 keyboard with different color schemes?

Yes, the KB40 is available in a variety of color options including Pink, Pale Gold, Night Black, Light Silver, Sage Green, and even random Cerakote finishes, allowing you to choose a style that matches your setup.

Is the KB40 suitable for both gaming and typing tasks?

Absolutely, the KB40's compact 40% layout combined with its electro-capacitive switches delivers a responsive and satisfying typing experience that is well-suited for both productivity and gaming. Its hot-swappable design also lets you experiment with different switches to find the perfect feel for your needs.

Niuniu KB40 Starting at $169.99

Name: Niuniu KB40
Brand: Niuniu
SKU: pre-order-kb40

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Niuniu KB40
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Niuniu KB40 - 40% Custom Keyboard Kit
	No shipping to US			$170 Out of stock	Visit Shop

Vendor

Location

Coupon Code

In Stock

Price (USD)

Link*

Niuniu KB40

Global

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Niuniu KB40 - 40% Custom Keyboard Kit

No shipping to US

$170

Out of stock

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Compare Niuniu KB40 vs KBDFans Agar Mini vs Keychron Q4 Pro Specification

Compare similar keyboards side by side, or use the comparison table to compare all keyboards!

Model	Niuniu KB40	KBDFans Agar Mini	Keychron Q4 Pro
	70	94	90
Rating	0.0 stars (0 reviews)	4.5 stars (4 reviews)	5.0 stars (2 reviews)
Purchase Options
Main differences	Released in 2026 Offers Ortholinear ergonomics Supports Bluetooth, 2.4 GHz, Wired, Wireless connectivity	Released in 2025 Supports VIAL configuration Supports Bluetooth, Wireless, Wired connectivity Equipped with a 1000 mAh battery Weighs about 700 g Sized at 40 x 250 x 120 mm Made with a Polycarbonate, Brass, Aluminum case	Released in 2023 Has Linear, Tactile, Clicky switch options Available in a 60% layout Built with the ANSI, ISO layout standard Supports Bluetooth, Wired, Wireless connectivity Equipped with a 4000 mAh battery Weighs about 1351 g Sized at 21 x 121 x 303 mm Features PBT keycaps Offers Yes, Rgb, South-face, Rgb South-face RGB lighting
Score	Scores Performance: 45.1 Build Quality: 73.1 Productivity: 77.3 Customizability: 63 Portability: 87.6	Scores Performance: 63.2 Build Quality: 94.3 Productivity: 94.1 Customizability: 95 Portability: 86.8	Scores Performance: 75.1 Build Quality: 87.3 Productivity: 91.2 Customizability: 95.3 Portability: 89.5
Name	Name Niuniu KB40	Name KBDFans Agar Mini	Name Keychron Q4 Pro
Release year	Release year 2026	Release year 2025	Release year 2023
Switch Options	Switch Options -	Switch Options -	Switch Options Linear, Tactile, Clicky
Profile	Profile Normal Profile	Profile Normal Profile	Profile Normal Profile
Hot Swappable	Hot Swappable	Hot Swappable	Hot Swappable
Layout Size	Layout Size 40%	Layout Size 40%	Layout Size 60%
Layout Standard	Layout Standard ANSI	Layout Standard ANSI	Layout Standard ANSI, ISO
Layout Ergonomics	Layout Ergonomics Ortholinear	Layout Ergonomics Normal	Layout Ergonomics Normal
Knob Support	Knob Support	Knob Support	Knob Support
Display Support	Display Support	Display Support	Display Support
Mac/Win Support	Mac/Win Support	Mac/Win Support	Mac/Win Support
Multi-Media Keys	Multi-Media Keys	Multi-Media Keys	Multi-Media Keys
USB-C	USB-C	USB-C	USB-C
USB passthrough	USB passthrough	USB passthrough	USB passthrough
Connection	Connection Bluetooth, 2.4 GHz, Wired, Wireless	Connection Bluetooth, Wireless, Wired	Connection Bluetooth, Wired, Wireless
Polling Rate	Polling Rate -	Polling Rate 1000 Hz	Polling Rate 1000 Hz
Battery capacity	Battery capacity -	Battery capacity 1000 mAh	Battery capacity 4000 mAh
Hall Effect Support	Hall Effect Support	Hall Effect Support	Hall Effect Support
QMK Support	QMK Support	QMK Support	QMK Support
VIA Support	VIA Support	VIA Support	VIA Support
VIAL Support	VIAL Support	VIAL Support	VIAL Support
N-Key Rollover	N-Key Rollover	N-Key Rollover	N-Key Rollover
Rapid Trigger	Rapid Trigger	Rapid Trigger	Rapid Trigger
Mount Style	Mount Style Gasket Mount	Mount Style Gasket Mount	Mount Style Gasket Mount
Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers
Sound Dampening	Sound Dampening	Sound Dampening	Sound Dampening
Backlight	Backlight	Backlight	Backlight Rgb, South-face
Case Colors	Case Colors	Case Colors	Case Colors
Case Material	Case Material Aluminum	Case Material Polycarbonate, Brass, Aluminum	Case Material Aluminum
Keycaps Material	Keycaps Material -	Keycaps Material -	Keycaps Material PBT
Dimensions	Dimensions -	Dimensions 40 x 250 x 120 mm	Dimensions 21 x 121 x 303 mm
Weight	Weight -	Weight 700g	Weight 1351g

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Product Description

The NIUNIU KB40 Electrocapacitive is a 40% mechanical keyboard kit designed for hobbyists and enthusiasts who want a compact layout with electrocapacitive switch compatibility. It suits users who value a small footprint and the option to customize with both MX-style and electrocapacitive switches. The kit format requires assembly and some familiarity with keyboard building.

Key Features

Supports both MX-style and electrocapacitive switches, allowing users to choose between different typing feels and durability.
Hotswappable PCB options simplify switch replacement without soldering.
Multiple layout options including staggered and ortholinear, catering to various typing preferences.
Wireless models support 2.4GHz connection but require a separate dongle for wireless use.

Build Quality

Aluminum top and bottom frame provide a solid, stable base for typing.
Includes gasket tadpoles and O-rings, which help reduce typing noise and soften keypress impact.
Rubber feet improve desk grip and stability during use.
PCB and plate materials vary by model, with FR4 for wired and aluminum for wireless versions.

Connectivity

Available in wired and wireless versions, offering flexibility depending on user setup.
Wireless models require purchasing a separate 2.4GHz dongle to enable connection.
Battery included only with wireless models.

Trade-offs

As a kit, assembly is required, which may not suit users seeking a ready-to-use keyboard.
No foam or sound dampening materials included, so users wanting quieter typing must source these separately.
Wireless dongle sold separately, adding complexity for users wanting wireless functionality.
Unknown details on firmware and software customization options.

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Frequently Asked Questions (FAQ)

The KB40 Electrocapacitive keyboard uses electro-capacitive switches, which provide a unique typing experience characterized by smooth keystrokes and a tactile yet quiet response. Unlike traditional mechanical switches that rely on physical contact, electro-capacitive technology detects key presses through changes in capacitance, resulting in improved durability and a distinct feel that many enthusiasts appreciate.