1. Product Overview
The COSTOM WK75 is a 75% layout wireless mechanical keyboard designed for gaming and productivity. It features multi-mode connectivity, hot-swappable switches, a gasket-mounted structure for enhanced typing feel, and customizable RGB backlighting.
Image: The COSTOM WK75 keyboard with purple keycaps and RGB lighting.
2. Package Contents
Verify that all items are present in the package:
- WK75 Keyboard x1
- Dust Cover x1
- Keycap Puller x1
- USB-C Cable x1
- User Manual x1
- Replacement Switches x3
- Addon Keycaps x1
Image: A visual representation of the WK75 keyboard and its included accessories, such as the USB-C cable, keycap puller, and replacement switches.
3. Setup Guide
3.1 Initial Setup and Charging
Before first use, it is recommended to fully charge the keyboard using the provided USB-C cable. Connect the USB-C end to the keyboard and the USB-A end to a power source (e.g., computer USB port, wall adapter).
3.2 Connectivity Modes
The WK75 supports three connection modes: 2.4GHz wireless, Bluetooth 5.0, and wired USB-C. Use the switch located on the side of the keyboard to select your desired mode.
- 2.4GHz Wireless: Insert the USB dongle into an available USB port on your device. Switch the keyboard to 2.4G mode. The keyboard should connect automatically.
- Bluetooth 5.0: Switch the keyboard to BT mode. On your device, search for Bluetooth devices and select 'WK75'. You may need to press FN+Q/W/E to select a Bluetooth channel (Q, W, or E will flash to indicate pairing mode).
- Wired USB-C: Connect the keyboard to your device using the USB-C cable. The keyboard will automatically switch to wired mode.
Image: The WK75 keyboard demonstrating its three connectivity options: 2.4GHz wireless, USB-C wired, and Bluetooth, with corresponding icons.
Image: A diagram illustrating the three connection modes (2.4G, USB-C, Bluetooth) and how to switch between them using FN key combinations or the physical switch.
3.3 Mac/Windows Compatibility Switch
The keyboard features a dedicated switch to toggle between Mac and Windows layouts, ensuring full compatibility with both operating systems.
4. Operating Instructions
4.1 RGB Backlighting Control
The WK75 keyboard offers 16.8 million RGB lighting colors and various effects. Use the following FN key combinations to control the backlighting:
- FN + ← / →: Adjust backlight speed.
- FN + ↑ / ↓: Adjust backlight brightness.
- FN + \|: Switch backlight mode.
- FN + DEL: Switch backlight color.
- FN + ← (left arrow): Turn backlight on/off.
- FN + TAB: Turn the backlight to white.
Image: The WK75 keyboard displaying various RGB lighting effects, with a diagram of FN key combinations for controlling speed, brightness, mode, and color.
4.2 Multimedia Knob Functionality
The dedicated multimedia knob provides quick control over audio:
- Rotate Clockwise: Volume Up.
- Rotate Counter-clockwise: Volume Down.
- Press for 3 Seconds: Mute/Unmute audio.
Image: Close-up view of the WK75's multimedia knob, illustrating its volume control and mute functions. Also shows the hidden USB dongle storage and adjustable kickstands.
4.3 Hot-Swappable Switches
The WK75 features hot-swappable sockets, allowing you to easily change 3-pin or 5-pin mechanical switches without soldering. Use the included keycap puller and switch puller to remove and install switches.
Image: A close-up of the WK75 keyboard's hot-swappable sockets, showing switches being removed and inserted, along with south-facing LEDs, pre-lubed linear switches, and plate-mounted stabilizers.
Image: A diagram demonstrating the hot-swappable socket, allowing users to personalize switches and keycaps with the included keycap puller.
4.4 Driver Customization Software
Download the official driver software to customize key remapping, macros, and RGB backlighting effects. This software provides full control over your keyboard's functionality and aesthetics.
Image: A screenshot of the WK75's driver customization software interface, showing options for key remapping, macro creation, and RGB backlight adjustments.
4.5 N-Key Rollover (NKRO)
The WK75 supports N-Key Rollover, allowing all keys to be registered simultaneously, which is crucial for fast typing and gaming without missed inputs.
4.6 Ergonomic Design
The keyboard features a 2-stage adjustable kickstand design, allowing you to set a comfortable typing angle to reduce hand fatigue during prolonged use. The invisible USB dongle storage prevents loss.
5. Gasket Structure
The WK75 incorporates a gasket-mounted structure with at least 5 layers of sound damping paddings. This design effectively reduces keystroke noise, providing a purer typing sound and a more natural, tactile feedback experience.
Image: An exploded view diagram illustrating the 5-layer sound damping paddings within the gasket-mounted structure of the WK75 keyboard, highlighting its benefits for sound and feel.
6. Switches and Keycaps
The keyboard comes with pre-lubed custom linear switches, offering a quiet mechanical feel and smooth operation. The keycaps are made from durable PBT material and feature side shine-through for enhanced RGB visibility.
Image: Detailed specifications for the Otemu White Mechanical Switch, including force curve, actuation force, pre-travel, total travel, minimum trigger force, and durability.
7. Battery Information
The WK75 is equipped with a 5000mAh long-life battery. It supports an auto-sleep mode to conserve power, providing up to 7 days of use with backlighting on and up to 15 days with backlighting off, depending on usage.
Image: Information regarding the WK75's 5000mAh battery, highlighting its auto-sleep mode and estimated battery life with backlighting on and off.
8. Maintenance
8.1 Cleaning
To clean the keyboard, power it off and disconnect it from your device. Use a soft, dry cloth to wipe the surface. For keycaps, you can use the included keycap puller to remove them and clean with mild soap and water, ensuring they are completely dry before reattaching.
8.2 Battery Care
To prolong battery life, avoid exposing the keyboard to extreme temperatures. If storing for an extended period, charge the battery to about 50% before storage.
8.3 Switch and Keycap Replacement
When replacing switches or keycaps, ensure the keyboard is powered off. Use the appropriate tools (keycap puller, switch puller) to prevent damage. Apply gentle, even pressure when removing and installing components.
9. Troubleshooting
- Keyboard not connecting: Ensure the keyboard is charged. Check the mode switch (2.4G, BT, Wired) matches your connection method. For 2.4G, ensure the dongle is properly inserted. For Bluetooth, ensure the keyboard is in pairing mode (FN+Q/W/E) and visible on your device. Try reconnecting or re-pairing.
- RGB backlighting not working: Check if the backlight is turned off (FN + ←). Adjust brightness (FN + ↑ / ↓). If using custom software, ensure settings are correctly applied.
- Keys not responding: Ensure the keyboard is connected and powered on. If specific keys are not working, try replacing the switch using the hot-swap feature.
- Keyboard stuck in FN mode or certain keys (e.g., Windows key, Alt+F4) not working: This can sometimes occur due to software conflicts or accidental key combinations. Try resetting the keyboard by pressing and holding FN + ESC for 3 seconds. If the issue persists, reinstall the driver software.
- Lag or input delay in wireless modes: Ensure the keyboard is close to the receiver/device. Avoid interference from other wireless devices. Ensure the battery is sufficiently charged.
10. Specifications
| Feature | Detail |
|---|---|
| Model Number | WK75 |
| Layout | 75% (82 keys + 1 knob) |
| Connectivity | Bluetooth 5.0, 2.4GHz Wireless, USB-C Wired |
| Switches | Hot-swappable, Pre-lubed Linear Mechanical Switches |
| Structure | Gasket Mounted with 5-layer sound damping paddings |
| Backlighting | RGB (16.8 million colors) |
| Battery Capacity | 5000mAh |
| Compatible Devices | PC, Laptop, Xbox, PS4, PS5 (Windows 2000/XP/Vista/7 and above) |
| Product Dimensions | 12.4"L x 4.45"W x 1.81"H |
| Item Weight | 2.48 pounds |
Image: A diagram illustrating the compact 75% layout of the WK75 keyboard, highlighting its 82 keys and single knob, and comparing it to a full-size keyboard layout.
11. Official Product Video
Video: A demonstration of the WK75 wireless RGB gaming mechanical keyboard, showcasing its design, RGB lighting, and typing experience.
12. Warranty and Support
The COSTOM WK75 keyboard comes with a standard manufacturer's warranty. For detailed warranty information, product support, or technical assistance, please refer to the official COSTOM website or contact their customer service directly. Keep your purchase receipt for warranty claims.