Buy a mechanical keyboard: how to choose the right layout, gasket mount and hot-swap features

A mechanical keyboard can provide reliable service for gaming, typing and work over many years. However, choosing one is not simply a matter of RGB lighting or switch colour. The key factors are layout, connection type, compatibility, noise levels and the potential for future customisation.

German users in particular often encounter these common buying pitfalls:

• QWERTY US layout is confused with German key mapping: Many compact models use a US ANSI layout. Keys such as “Z”, “Y”, “Ä”, “Ö” and “Ü” may not be labelled accordingly or may not be included as separate keycaps.
• Gasket mount is promoted as an automatic noise-reduction feature: This construction can make the keystroke more flexible. However, how loud a keyboard actually is also depends on the switches, keycaps, case and sound-dampening material.
• Wireless flexibility is chosen without checking the battery and wireless mode: Bluetooth, 2.4 GHz and USB-C have different characteristics. For competitive gaming, a wired connection may be more practical, while Bluetooth makes it easier to switch between several devices.

The most important criteria before buying

1. A layout and size that suit your desk

A 75% keyboard usually offers the most important function keys, arrow keys and a compact arrangement. It does not have a number pad. An 80% keyboard, also known as a tenkeyless keyboard, is similarly compact and often follows an 87-key layout. Both options create more room for your mouse than a full-size model.

Before buying, check the following:

• Do you want a QWERTY US layout, or do you need a German QWERTZ layout?
• Do you regularly use Home, End or function keys?
• Do you need a separate number pad for spreadsheets, accounting or data entry?
• Does the width fit your available desk space?

The KEYSME Lunar 01 is listed with 87 keys in a US layout, while the AJAZZ AK820 is described as a 75% model with a compact key arrangement. On Windows and Mac, the layout and special keys can be adjusted to some extent through the system settings. This does not change the labels on the keycaps, however.

2. Switches, hot-swap and gasket mount

Linear switches move without a tactile bump and are often chosen for gaming and smooth typing. Tactile switches provide noticeable resistance, while clicky switches can also produce a distinct audible signal.

A hot-swappable keyboard allows you to replace compatible switches without soldering them to the PCB. The specified socket standard is important: according to the product details, the KEYSME Lunar 01 supports 5-pin switches. The AJAZZ AK820 is described as having a 3-/5-pin-compatible hot-swap PCB. When replacing switches, the pins must be aligned straight, as incorrectly inserted switches can damage the sockets.

In a gasket-mount keyboard, the plate is held in elastic cushioning elements. Together with foam, silicone or other inserts, this can affect the feel of each keystroke. However, the construction is not a consistent quality standard. You should also pay attention to:

• the plate’s material and flexibility
• the sound-dampening and foam layers included
• the type of stabilisers
• the switch type and actuation force
• how easy the keyboard is to clean and whether replacement parts are available

3. Connectivity, operating systems and battery

A wired mechanical keyboard transfers data without a battery and generally does not require wireless pairing. A wireless mechanical keyboard is more flexible, but it does need to be charged. A tri-mode keyboard usually offers USB-C, Bluetooth and 2.4 GHz wireless connectivity.

The KEYSME Lunar 01 lists Bluetooth with three channels, 2.4 GHz and USB-C, as well as a capacity of 4000 mAh. The AJAZZ AK820 Pro is also described as offering these three connection types and a 4000-mAh battery. Actual battery life depends on factors including RGB brightness, wireless mode and usage. A specific number of hours should therefore not be inferred from battery capacity alone.

For a keyboard for PC and Mac, it is also important to check whether the configuration software supports both systems. On iOS and Android, input often works via Bluetooth, while macros, firmware updates or RGB adjustments may require a Windows or macOS computer.

4. Keycaps, lighting and additional features

PBT keycaps are generally considered more resistant to developing a glossy finish than many ABS keycaps. Durability also depends on material thickness, the lettering process and daily use. Dye-sublimated legends, as specified for the KEYSME Lunar 01, are a specific technical feature, but they do not guarantee unlimited service life.

An RGB keyboard can offer adjustable brightness, colours and effects. For practical use, south-facing LEDs, software support and keycap legibility are more important than the number of lighting effects alone. A programmable volume dial is particularly useful if you often need media controls while gaming or working.

Our selection by user profile

Suitable for: Budget-conscious beginners

AJAZZ AK820 75% Wired Mechanical Keyboard

Why this product suits this profile: This wired 75% keyboard is aimed at users looking for a compact mechanical gaming keyboard for PC, Windows or Mac without the need to manage a battery.

How this product avoids the pitfall

The connection is clearly specified as a Type-C cable. Hot-swap, a gasket structure and sound-dampening mats are listed as specific features rather than simply being marketed as wireless convenience.

Main benefit & strengths

75% layout, PBT keycaps, CNC volume dial, RGB lighting and support for 3-/5-pin switches.

Suitable for: Buyers with high quality standards

KEYSME Lunar 01 80% Tri-Mode Mechanical Keyboard, Black

Why this product suits this profile: For prolific typists and custom keyboard enthusiasts, this model offers several connection options, an 87-key US layout and extensive customisation possibilities.

How this product avoids the pitfall

Bluetooth, 2.4 GHz and USB-C are available as separate connection options. The product details also specify hot-swap support for 5-pin switches and a 4000-mAh battery.

Main benefit & strengths

Gasket mount with several cushioning elements, PBT dye-sublimated keycaps, programmable dial and software for macros, key mapping and RGB.

Suitable for: Special uses & heavy users

AJAZZ AK820 Pro 75% Mechanical Tri-Mode Keyboard

Why this product suits this profile: This model combines a compact layout with tri-mode connectivity, a TFT display and a rotary dial for gaming, office work and use with multiple devices.

How this product avoids the pitfall

According to the product description, the current connection mode and battery level are shown on the TFT display. This keeps important status information visible.

Main benefit & strengths

Bluetooth, 2.4 GHz and USB-C, 4000-mAh battery, hot-swap, RGB lighting, PBT keycaps and programmable volume dial.

Mechanical keyboard FAQ

Is a mechanical keyboard suitable for the office?

Yes, provided the switches and noise level are suitable for the working environment. Linear switches are not automatically quiet. Sound-dampening mats, gasket mount and suitable keycaps can influence the sound profile, but they do not replace consideration for others in shared spaces.

How long does a mechanical keyboard last?

Its lifespan depends on the switches, hot-swap sockets, keycaps, cables and daily usage. Manufacturer specifications such as a switch lifespan of 50 million or 600 million actuations apply to individual components and are not a guarantee for the keyboard as a whole. Regular dry cleaning and careful switch replacement can help extend its use.

Which mechanical keyboard is suitable for Windows and Mac?

Models with stated Windows/macOS compatibility are suitable for both systems. With a keyboard for PC and Mac, you should also check the modifier keys, configuration software and preferred layout. If you use several devices, you may want to consider a tri-mode keyboard with Bluetooth, 2.4 GHz and USB-C.