X4 QMK Wired Mechanical Keyboard 75% Layout - Customizable, Red

Our review of the X4 QMK Wired Mechanical Keyboard finds it best suited for gamers and enthusiast typists who want a highly customizable 75% board that still keeps a compact footprint. The single biggest reason to buy is its combination of open QMK/VIA remapping and a durable gasket-mount build that delivers a pleasant typing sound and feel while supporting rapid 1000 Hz polling for competitive play. In short, this keyboard blends serious customization with solid hardware choices for long sessions at the desk.

Key Features

• QMK/VIA customization: Remap any key or create macros with the Lemokey Launcher web app or open-source QMK firmware for fully personalized layouts across macOS, Windows, and Linux.
• 75% layout: A compact layout that preserves important keys while saving desk space compared with a full-size board, useful for both gaming and productivity.
• 1000 Hz polling rate: High polling delivers reduced input latency for fast-paced gaming and smoother responsiveness in competitive scenarios.
• Side-printed double-shot PBT keycaps: Cherry-profile, oil-resistant keycaps keep legends from fading and allow the south-facing red backlight to shine through cleanly.
• Gasket-mount with PC plate: The gasket mount combined with a PC plate creates a slightly flexible, damped typing feel and contributes to a pleasing acoustic signature.
• Tactile brown switches: Tactile Brown mechanical switches provide a balance of feedback and smooth actuation that suits mixed typing and gaming use.

Who It's For

The X4 is ideal for mechanical keyboard hobbyists and gamers who want deep layout control and reliable hardware. Players who value low latency will appreciate the 1000 Hz polling and N-key rollover, while those who build custom keymaps will benefit from QMK/VIA support and the Lemokey Launcher web app.

Users who prefer fully programmable boards and a compact 75% form factor will be pleased, but those who need a numpad or wireless connectivity should look elsewhere since this is a wired, compact design focused on customization and typing feel rather than extra keys or untethered use.

Pros & Cons

Pros

• Highly customizable keymapping via QMK and the Lemokey Launcher web app for platform-wide flexibility.
• Solid build with gasket-mount and PC plate that improves typing sound and comfort.
• Durable Cherry-profile double-shot PBT keycaps that resist oil and preserve legends.
• 1000 Hz polling and N-key rollover for reliable gaming performance.

Cons

• Wired-only 75% layout omits a dedicated numpad, which may not suit some productivity users.
• South-facing backlight limits some switch and keycap lighting compatibility choices for users wanting different RGB effects.

Specifications

Layout	75%
Firmware	QMK / VIA (Lemokey Launcher web app)
Polling Rate	1000 Hz
Keycaps	Side-printed double-shot PBT, Cherry profile
Switch Type	Tactile Brown mechanical switches
Mount / Plate	Gasket-mount structure with PC plate
Backlight	South-facing red backlit

Our Verdict

The X4 QMK Wired Mechanical Keyboard is a strong value for anyone who wants a compact, highly programmable board with a pleasing typing sound and competitive input performance. It is worth buying for gamers and keyboard enthusiasts who will use QMK/VIA customization and value durable PBT keycaps; users who need wireless connectivity or a full-size layout should consider other options.

Frequently Asked Questions

Can I remap keys on macOS?
Yes, the Lemokey Launcher web app and QMK firmware allow remapping on macOS, Windows, and Linux.

Are the keycaps durable?
Yes, the side-printed double-shot PBT Cherry-profile keycaps are oil resistant and designed to prevent legends from fading.

Does it support simultaneous key presses?
Yes, the keyboard has N-key rollover and advanced anti-ghosting so multiple keypresses register accurately.