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Purple 75% wireless mechanical keyboard with gasket structure and RGB backlighting

costom

costom WK75 75% Wireless Gaming Keyboard Purple

SKU CH-S9FM-7FST9

A compact 75% mechanical keyboard with Bluetooth 5.0, 2.4GHz wireless and USB-C wired modes, hot-swappable linear switches, gasket-mounted sound dampening and RGB backlighting

  • Product nameWK75
  • StyleClassic
  • Keyboard layout75%
  • Wrist restHot-Swappable
  • Mechanical keyboardMechanical
  • Switch typeLinear

Color Purple

  • Compact 75% layout saves desk space while keeping function keys
  • Gasket mount with five damping layers cuts keystroke noise for a cleaner sound
  • Hot-swappable sockets accept most 3-pin or 5-pin switches for easy customisation
  • Bluetooth 5.0, 2.4 GHz wireless and USB-C wired modes switch via a side button
  • 8 million RGB colours with 12 music-rhythm effects adjustable by knob or FN keys

Compact 75% Wireless Mechanical Keyboard

The costom WK75 is a 75% wireless mechanical keyboard with a purple plastic case and linear switches. It uses a gasket structure with multiple sound-damping layers to reduce keystroke noise. Three connection modes are available: Bluetooth 5.0, 2.4 GHz wireless and USB-C wired. Per-key RGB backlighting offers 16.8 million colours and music-rhythm effects.

Check Connectivity and Switch Preference

Verify that your devices support Bluetooth 5.0 or have a free USB port for the 2.4 GHz receiver before ordering. The keyboard arrives with pre-lubed custom linear switches; confirm you prefer a linear feel rather than tactile or clicky feedback. Hot-swappable sockets accept most 3-pin and 5-pin switches if you plan to change them later. A keycap puller and three spare switches are included in the box.

Suits Multi-Device Users Wanting Customisation

This keyboard suits users who switch between PC, laptop and console platforms and want per-key RGB control with macro support via software. The compact 75% layout saves desk space while keeping function keys. Buyers who need a full-size layout with dedicated number pad or who prefer tactile or clicky switches out of the box should look at other options.

How it compares

Measured against everything we stock in Keyboards for PC Gaming, at today’s prices. Recalculated every night.

Price $48.99
Cheaper than about 71% of the 3,966 comparable items (median $68.99).

Specifications

Product
Brand nameCostom
Model nameWK75
Product nameWK75
StyleClassic
Keyboard colorPurple
Power
Power typeCorded Electric
Size & build
Main materialPlastic
Keyboard layout75%
Mechanical keyboardMechanical
Switch typeLinear
Product dimensions12.4 in × 4.45 in × 1.81 in
HandednessAmbidextrous
In the box
In the boxKeycap Puller
More details
Wrist restHot-Swappable
BacklightingRgb

Other versions of this model

2 more in the same range

Questions about this item

What accessories are included with the WK75 and what must be purchased separately?

The box contains the keyboard and a 2-in-1 keycap puller. Three extra linear switches are also supplied. Keycaps and additional switches are not included.

How do I choose between Bluetooth 5.0, 2.4 GHz wireless and USB-C wired modes on this keyboard?

A side shortcut button cycles through Bluetooth 5.0, 2.4 GHz wireless and Type-C wired connections. Pick Bluetooth for portable devices, 2.4 GHz for low-latency gaming, or wired for charging while playing.

What does the 16.8 million RGB colour figure mean in daily use?

It means the backlight can display any of 16.8 million colours across 12 factory music-rhythm effects plus single-colour modes. Brightness and speed are adjusted via the knob or FN key combos.

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