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header-product Keychron K3X-B4 Mechanical Keyboard 75% Layout USB and Bluetooth Connectivity English QWERTY Grey RGB LED Backlight
89.49 €

Keychron K3X-B4 Mechanical Keyboard 75% Layout USB and Bluetooth Connectivity English QWERTY Grey RGB LED Backlight

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Keychron K3X-B4 Mechanical Keyboard 75% Layout USB and Bluetooth Connectivity English QWERTY Grey RGB LED Backlight

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Keychron K3X-B4 Mechanical Keyboard 75% Layout USB and Bluetooth Connectivity English QWERTY Grey RGB LED Backlight

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Price without discount: 97.99 €
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Short description

The Keychron K3X-B4 is a versatile 75% mechanical keyboard designed for universal daily use. Featuring both wired and wireless connectivity via USB and Bluetooth, it offers flexible setup options for any workspace. Equipped with 84 English QWERTY keys, durable mechanical switches, and a vibrant RGB LED backlight, this grey keyboard ensures a comfortable and responsive typing experience. Built-in battery power and a USB Type-C charging port add convenience for both mobile and desktop users.
Available for order: 20 pcs.
Warranty: 2 Years
SKU: 11694758
Manufacturer: Keychron
Charging device not included Charging device not included
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1.99 €

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2b. Kengaraga str., Riga, Latvia, LV-1063
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Product information

Description

The Keychron K3X-B4 mechanical keyboard is designed for universal daily use, combining a compact 75% layout with dual wired and wireless connectivity options. Featuring a durable grey chassis, 84 English QWERTY keys, and vibrant RGB LED backlighting, this model offers a comfortable and responsive typing experience for various workspaces. With built-in battery power and a convenient USB Type-C charging port, it easily adapts to both desktop setups and mobile use.

Advantages

The keyboard provides versatile dual connectivity through a reliable wired USB interface and wireless Bluetooth, allowing seamless switching between multiple devices such as laptops, tablets, and desktop computers. Its ultra-slim 75% form factor saves valuable desk space while retaining essential navigation and function keys. The inclusion of durable mechanical switches ensures precise tactile feedback and longevity. Additionally, the vibrant RGB LED backlight enhances visibility in low-light environments and allows visual customization.

Suitable for

  • Universal daily typing and office tasks
  • Multi-device workflows using wireless connectivity
  • Compact desk setups requiring a 75% layout
  • Users seeking a portable mechanical keyboard with USB Type-C charging

When it may not be suitable

This keyboard may not be the ideal choice for users who frequently require a dedicated numeric keypad for extensive data entry or financial work. Additionally, users who prefer a full-sized traditional keyboard layout or non-mechanical key response might find the compact 75% form factor and mechanical switches less suitable for their specific preferences.

Key specifications

  • Keyboard form factor: 75%
  • Connectivity technology: Wired and wireless
  • Device interface: USB and Bluetooth
  • Keyboard key switch: Mechanical
  • Keyboard layout: QWERTY
  • Keyboard language: English
  • Number of keys: 84
  • Backlight: RGB LED
  • Power source: Battery
  • Product colour: Grey
  • USB Type-C charging port included

How to use

To use the keyboard in wired mode, connect it directly to your computer using the provided USB cable. For wireless operation, activate the Bluetooth function to pair the keyboard with your compatible device, utilizing the internal battery for power. You can recharge the battery by plugging a USB Type-C cable into the designated charging port. Switch between connected devices or adjust settings according to your workspace requirements.

What to consider before purchase

  • Verify that the 75% compact layout meets your daily typing and navigation needs without a numeric keypad.
  • Ensure compatibility with your operating systems for both USB and Bluetooth connection modes.
  • Confirm whether an English QWERTY key layout aligns with your typing language requirements.

For optimal performance and battery longevity, turn off the wireless connection when the keyboard is not in use for extended periods, and clean the mechanical switches regularly to prevent dust accumulation.

Specifications

AC adapter included:
No
Number of products included: The number of products that are included in the package.
1 pc(s)
Mouse included: A mouse is included with this product.
No
USB Type-C charging port:
Yes
Backlight: Product has a built-in light source for its illuminating.
Yes
Numeric keypad: Small, palm-sized, seventeen key section of a computer keyboard, usually on the very far right. The numeric keypad features digits 0 to 9, addition (+), subtraction (-), multiplication (*) and division (/) symbols, a decimal point (.) and Num Lock and Enter keys. Laptop keyboards often do not have a numpad, but may provide numpad input by holding a modifier key (typically labelled "Fn") and operating keys on the standard keyboard.
No
Keyboard form factor: Keyboard size, e.g. standard, mini.
75%
Pointing device:
No
Keyboard layout: The type of keys on a keyboard, and their position on the keyboard. This can differ from country to country.
QWERTY
Keyboard key switch: The characteristics of the key switch, mechanical vs rubber dome. A mechanical key switch is usually more expensive, gives a stronger feedback and can be more precise.
Mechanical
Device interface: The ports (sockets) where the device connects with other devices.
USB + Bluetooth
Connectivity technology: The technology that enables connectivity of the device, e.g. wired or wireless.
Wired & Wireless
Recommended usage: What the product should be used for, and how it should be used (e.g. ambient temperature).
Universal
Power source type: What the power source is.
Battery
Product colour: The colour e.g. red, blue, green, black, white.
Grey
Keyboard language: The letters which are marked on the keys for convenience of the keyboard usage with specific language.
English
All features

Packaging content

AC adapter included:
No
Number of products included: The number of products that are included in the package.
1 pc(s)

Weight & dimensions

Keyboard weight:
540 g
Keyboard dimensions (WxDxH):
116 x 306 x 23

Operational conditions

Operating temperature (T-T): The minimum and maximum temperatures at which the product can be safely operated.
-10 - 50

System requirements

Linux operating systems supported: 8 RT. Linux (9.4, 9.5), Red Hat Enterprise Linux 5.0 (supported with a pre-built package); SUSE Linux (10.3, 11.0, 11, 11.1, 11.2), Fedora (9, 9.0, 10, 10.0, 11.0, 11, 12, 12.0), Ubuntu (8.04, 8.04.1, 8.04.2, 8.10, 9.04, 9.10, 10.04), Debian (5.0, 5.0.1, 5.0.2, 5.0.3)
Y
Mac operating systems supported: Mac operating systems e.g. OS X can be used with the device.
Y
Windows operating systems supported: Windows vesions wich can be used with the device.
Y

Mouse

Mouse included: A mouse is included with this product.
No

Battery

Battery capacity: A measure of the charge stored by the battery. Determined by the mass of active material contained in the battery.
1550 mAh
Battery technology: The type of battery in the device, e.g. nickel–cadmium (NiCd).
Lithium Polymer (LiPo)

Power

USB Type-C charging port:
Yes
Rechargeable: The device can be connected to a power supply in order to restore electrical energy in the battery.
Yes
Battery life (max): Maximum battery life. Mobile Mark™ (2002) is the standard often used to benchmark battery life time.
124 h
Keyboard battery type:
Built-in battery
Power source type: What the power source is.
Battery

Features

Detachable cable:
Yes
USB connector type: The type of USB connector/port that this product has.
USB Type-C

Design

Material: The material from which a thing is or can be made e.g. wood, plastic.
Aluminium, Acrylonitrile Butadiene Styrene (ABS)
Surface coloration: Type of surface coloration e.g. monotone, image.
Monochromatic
Product colour: The colour e.g. red, blue, green, black, white.
Grey
Adjustable backlight:
Yes
Backlight colour:
Multicolour
Backlight type:
RGB LED
Backlight: Product has a built-in light source for its illuminating.
Yes

Keyboard

Bluetooth version: The type of bluetooth technology in the product e.g. Bluetooth Smart (v4.0).
5.2
Built-in memory capacity:
256 KB
Built-in memory: There is an internal memory.
Yes
Polling rate:
90, 1000
Rollover:
N-key rollover
Multimedia keys:
Yes
Keyboard key profile:
Low-profile
Keyboard number of keys:
84
Keycaps material:
Acrylonitrile butadiene styrene (ABS)
Physical layout:
ANSI
Numeric keypad: Small, palm-sized, seventeen key section of a computer keyboard, usually on the very far right. The numeric keypad features digits 0 to 9, addition (+), subtraction (-), multiplication (*) and division (/) symbols, a decimal point (.) and Num Lock and Enter keys. Laptop keyboards often do not have a numpad, but may provide numpad input by holding a modifier key (typically labelled "Fn") and operating keys on the standard keyboard.
No
Keyboard form factor: Keyboard size, e.g. standard, mini.
75%
Pointing device:
No
Keyboard language: The letters which are marked on the keys for convenience of the keyboard usage with specific language.
English
Keyboard layout: The type of keys on a keyboard, and their position on the keyboard. This can differ from country to country.
QWERTY
Keyboard key switch technology:
Keychron Milk POM Banana
Keyboard key switch: The characteristics of the key switch, mechanical vs rubber dome. A mechanical key switch is usually more expensive, gives a stronger feedback and can be more precise.
Mechanical
Device interface: The ports (sockets) where the device connects with other devices.
USB + Bluetooth
Connectivity technology: The technology that enables connectivity of the device, e.g. wired or wireless.
Wired & Wireless
Recommended usage: What the product should be used for, and how it should be used (e.g. ambient temperature).
Universal

Description

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Product comparison

This product page focuses on the Keychron K3X-B4 mechanical keyboard, compared against alternative models from the same brand: Keychron K15 Max, Keychron K2 Max, Keychron V2 Max V2M-D3, Keychron K3 Max, and Keychron K17 Max QMK. All these devices are designed for universal use, feature backlighting and an English QWERTY layout, but differ in form factor, key counts, wireless connectivity options, and ergonomic design.

⚙️ The table below compares key characteristics such as keyboard form factor, connectivity interfaces, key count, and additional features to highlight the practical differences between the standard Keychron K3X-B4 and the alternative choices.

ParameterKeychron K3X-B4Keychron K15 MaxKeychron K2 MaxKeychron V2 Max V2M-D3Keychron K3 MaxKeychron K17 Max QMKPractical Conclusion
Form factor75%75% (curved)75%65%75%75% (with numeric keypad)Most models use the standard 75% layout, but V2 Max offers an ultra-compact 65% size, while K17 Max incorporates a numeric keypad into a compact body.
Number of keys849084Not specified84104The 84-key models maintain a great balance between space-saving and functionality, whereas the K17 Max expands input options with a numeric pad.
ConnectivityUSB + BluetoothUSB + RF + BluetoothRF WirelessUSB + RF + BluetoothUSB + RF + BluetoothUSB + RF + BluetoothKeychron K3X-B4 relies on wired connection and Bluetooth, while most alternatives also add a 2.4 GHz RF wireless dongle for enhanced wireless versatility.
ColorGreyGreyGrey, BlackBlack, CarbonGreyBlackThe color options utilize neutral and professional tones suitable for any office or home desk setup.

◎ The table below evaluates the suitability of each product for different user needs and usage scenarios.

Use caseRecommended productWhy
Universal office and home typing with basic wireless connectivityKeychron K3X-B4Provides a well-balanced 75% layout with wired and Bluetooth modes, ideal for straightforward daily workflows.
Enhanced ergonomics for comfortable typing sessionsKeychron K15 MaxFeatures a specialized curved body design intended to improve typing comfort during extended use.
Gaming and productivity requiring a numeric keypad in a compact layoutKeychron K17 Max QMKCombines 104 keys and a numeric pad with a practical footprint and programmable firmware support.
Desk space optimizationKeychron V2 Max V2M-D3Utilizes a smaller 65% form factor to free up maximum desk space for mouse movement.

The Keychron K3X-B4 is best suited for users looking for a reliable, universal 75% keyboard with Bluetooth and wired connection for everyday typing tasks. If you specifically require a 2.4 GHz RF wireless receiver for a stronger connection, an ergonomic curved frame, an ultra-compact 65% size, or an integrated numeric keypad, you may prefer one of the alternative Max series models.

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Customer reviews

Customer questions

FAQ

How much does the Keychron K3X-B4 Mechanical Keyboard cost, and is it available for purchase?

The price is 89.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 20 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on Tomorrow at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Cash payment, Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

Can Keychron K3X-B4 Mechanical Keyboard be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. We work with leading banks and leasing companies in Latvia, allowing you to make your purchase on convenient terms — with a minimal down payment and a repayment period from 3 to 36 months. You can apply for credit or installments for the Keychron K3X-B4 Mechanical Keyboard online, and the application process is as simple as possible:
  • Select the product on the website and add it to your cart;
  • When placing your order, choose the payment method “Installments”;
  • Fill in the required details for the lending partner;
  • Receive a decision within a few minutes.
For more information about available payment options, interest-free installment terms, and credit conditions in Latvia, please visit the Payment page.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All Keychron products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Keychron service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: ac adapter included, number of products included, mouse included, usb type-c charging port, backlight, numeric keypad, keyboard form factor, pointing device, keyboard layout, keyboard key switch, device interface, connectivity technology, recommended usage, power source type, product colour, keyboard language, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.
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