COSTOM Retro 75% Wireless Mechanical Keyboard Review: Who It Fits and Who Should Skip It

What stands out

• Tri-mode connectivity via USB-C, Bluetooth 5.1, and 2.4GHz wireless.
• Smart OLED color display shows status, custom GIFs, and battery levels.
• Mechanical knob controls volume, backlight, connection, and system settings.
• Hot-swappable PCB supports most 3-pin and 5-pin switches.

Who it fits

Key specs explained for this keyboard

Form Factor: 75%

This layout keeps function keys and arrow keys while removing the numpad. You save desk space without losing essential shortcuts. It fits well on smaller desks or alongside a mousepad. If you need full-size inputs, this may feel cramped. For most users, it offers a balanced mix of compactness and utility.

Connectivity: USB-C wired, Bluetooth 5.1, 2.4GHz

You have three ways to connect. Wired mode offers zero latency for gaming. Bluetooth 5.1 lets you pair with laptops or tablets. The 2.4GHz dongle provides a stable wireless link for PCs. You can switch between these modes using the knob. This flexibility suits multi-device setups or travel.

Backlighting: RGB

This feature allows you to customize key colors and effects. You can choose from multiple modes and adjust brightness to save battery. The software lets you sync lights with music or create custom patterns. If you prefer a clean look, you can turn the lights off entirely. It adds visual flair to your setup.

Hot-Swap Support: Hot-Swappable

You can change switches without soldering. This means you can try different switch types to find your preferred feel. If a switch fails, you can replace just that unit. It extends the keyboard lifespan significantly. This feature is ideal for enthusiasts who want to tweak their typing experience over time.

Design and build specs

The listing describes the M87 Pro as a compact mechanical keyboard with a 75% layout. This form factor retains function keys and arrow keys while removing the numeric keypad. You save desk space without losing essential shortcuts. The dimensions are listed as 16.7 inches in length, 7.68 inches in width, and 1.97 inches in height. These measurements indicate a footprint that fits well on smaller desks or alongside a mousepad.

Materials and construction details highlight a focus on sound and customization. The listing notes a triple absorption layer design, including EVA sound absorbing foam, an IXPE switch pad, and sponge case foam. Silencer foam is installed under the space bar to reduce vibration and improve rebound speed. The PCB is hot-swappable, allowing you to alter every switch without soldering. This supports compatibility with almost all 3-pin and 5-pin switches on the market.

Controls are managed through a mechanical knob and an OLED color display. The knob allows quick adjustment of connection modes, system settings, backlight brightness, RGB modes, volume, and language. The display shows status indicators like battery life and connection type. The finish is described as grey, with carbon also available. This setup prioritizes tactile control and visual feedback over traditional software menus.

Setup and everyday use

The M87 Pro supports three connection modes. You can use USB-C wired, Bluetooth 5.1, or 2.4GHz wireless. Switching between these modes is straightforward. You can toggle connections using key combinations or the built-in mechanical knob. This knob also controls volume, backlight brightness, and RGB modes. The physical control simplifies daily adjustments without needing to reach for software. Setup involves selecting your preferred connection type. For wireless use, you pair the device via Bluetooth or insert the 2.4GHz receiver. The keyboard recognizes the input source automatically. Once connected, you can customize the experience. The included driver allows full control over RGB backlighting, macros, and the OLED display. You can set custom GIF images on the small screen. This display shows battery life, connection status, and system mode. The hot-swappable PCB lets you change switches without soldering. This feature supports almost all 3-pin and 5-pin switches. You can personalize the typing feel by swapping components. The keyboard includes sound-dampening foam layers. These reduce vibration and improve acoustic output. The RGB lighting offers 19 modes with adjustable speed and brightness. You can turn off lights to save power. The device works with Windows and Mac systems. You switch between these OS modes using the knob or keys. The compact 75% layout fits on most desks. It leaves room for mouse movement while keeping essential keys accessible. Daily use involves minimal friction. The physical controls handle most adjustments instantly. The software handles deeper customization. This setup suits users who want quick access to settings.

Before You Buy This Keyboard

You should verify your computer’s operating system before purchasing. The listing notes WIN/MAC compatibility, but you must check your specific driver support for full customization. The M87 Pro includes pro software for macro and GIF settings. You need to install this driver on your host device to unlock the OLED display features and RGB modes. Keep in mind the hot-swappable PCB. While you can change switches easily, you will need to buy separate mechanical switches if you want to alter the typing feel. The silencing foam is pre-installed, so you do not need to add extra layers. This keyboard fits well on compact desks. It sits alongside other wireless options in this guide by offering a unique knob interface. You get tri-mode connectivity and a color screen. These specs make it distinct from standard 75% boards. Check your desk space. The listed dimensions are 16.7 inches in length. Ensure you have room for the extra width of the knob assembly.

Check before you buy

• Confirm your OS supports the M87 Pro driver software.
• Check if your desk fits the 16.7-inch length.
• Verify you have spare switches for hot-swap changes.
• Ensure you have space for the volume knob.
• Check Bluetooth 5.1 compatibility with your devices.

The product at a glance

1

COSTOM Retro 75% Wireless Mechanical Keyboard

Best for: Gamers wanting OLED readouts and hot-swappable switches

Form Factor

75%

Connectivity

USB-C wired, Bluetooth 5.1, 2.4GHz

Backlighting

RGB

Hot-Swap Support

Hot-Swappable

Media Controls

Volume Knob

Use

Gaming

View on Amazon: COSTOM Retro 75% Wireless Mechanical Keyboard Affiliate link

This keyboard pairs a compact 75% layout with tri-mode connectivity across 2.4GHz, Bluetooth 5.1, and USB-C wired connections. You get hot-swappable 3-pin and 5-pin switch sockets, triple-layer internal sound-dampening foam, and a color OLED screen paired with a multi-function control knob. It suits you if you want retro styling, quick hardware status readouts, and easy switch customization without soldering.

Pros

• Tri-mode wireless via 2.4GHz, Bluetooth 5.1, and USB-C
• Built-in OLED color display and multi-function rotary knob
• Hot-swappable PCB supports 3-pin and 5-pin switches
• Triple sound-absorption layers including EVA and IXPE foams

Cons

• Thick 1.97-inch profile requires elevated wrist clearance
• Compact 75% layout omits a dedicated numeric keypad
• Data does not specify exact battery capacity

Good fit if

• You want visual on-board status readouts and custom GIFs via an OLED display.
• You plan to swap 3-pin or 5-pin mechanical switches without soldering.
• You switch frequently between Bluetooth 5.1, 2.4GHz, and USB-C setups.

Skip if

• You need a dedicated number pad for numerical data entry.
• You prefer a low-profile desk setup without a tall 1.97-inch frame.

Verdict: COSTOM Retro 75% Wireless Mechanical Keyboard delivers versatile tri-mode connectivity and hot-swappable switch support for users who want hardware knob controls and an integrated OLED status screen. It provides multi-layer sound dampening in a compact form factor for setups that do not need a number pad.

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See also

• costom womier retro 75 gaming alternatives
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