Cosmic Byte CB-GK-28
Cosmic Byte CB-GK-28 Vanth Mechanical Keyboard User Manual
Model: CB-GK-28 | Brand: Cosmic Byte
Introduction
This manual provides comprehensive instructions for the Cosmic Byte CB-GK-28 Vanth Mechanical Keyboard. It covers setup, operation, maintenance, and troubleshooting to ensure optimal performance and longevity of your device. The CB-GK-28 is a full-size mechanical keyboard featuring 104 keys, Outemu Red Swappable Switches, Rainbow LED backlighting, and advanced gaming functionalities.

Figure 1: Cosmic Byte CB-GK-28 Vanth Mechanical Keyboard overview.
Setup Guide
Follow these steps to set up your Cosmic Byte CB-GK-28 keyboard:
- Unpacking: Carefully remove the keyboard and its accessories from the packaging. Ensure all components, including the USB cable and any included key/switch pullers, are present.
- Connection: Connect the USB-A end of the keyboard's cable to an available USB port on your PC or laptop.
- Driver Installation: The keyboard is plug-and-play and typically does not require specific driver installation for basic functionality on Windows 10 and other compatible operating systems. Your system should automatically detect and configure the device.
- Placement: Place the keyboard on a stable, flat surface. Adjust the rear feet for a comfortable typing angle if desired.

Figure 2: The CB-GK-28 Vanth Mechanical Keyboard, ready for setup.
Operating Instructions
The Cosmic Byte CB-GK-28 keyboard offers various features for enhanced usability and gaming performance.
Key Features:
- Full Size Layout: 104 keys for comprehensive functionality.
- Outemu Red Mechanical Switches: Designed for silent operation and a smooth keystroke experience, with a lifespan of 50 million+ operations per key.
- Swappable Switches: Easily change switches using the included switch puller. Compatible only with Outemu switches. Two additional switches are included.
- Anti-Ghosting: Supports simultaneous operation for all keys without any ghosting effects, ensuring every keystroke is registered accurately. FN+SCRLK can switch between 6-key anti-ghosting and full-key anti-ghosting.
- Rainbow LED Backlight: Features 20 backlight effects and 8 game modes. Brightness and speed are adjustable.
- Multimedia Hot Keys: Access media controls quickly using FN key combinations.
- 1000 Hz Polling Rate: Ensures rapid response times for competitive gaming.
- Durable Construction: Injection molded double-shot color keycaps and a metal body for enhanced durability and scratch resistance.
Function Key Combinations (FN + Key):
| Combination | Function |
|---|---|
| FN + F1 | My Computer |
| FN + F2 | Search |
| FN + F3 | Calculator |
| FN + F4 | Media Player |
| FN + F5 | Previous Track |
| FN + F6 | Next Track |
| FN + F7 | Play/Pause |
| FN + F8 | Stop |
| FN + F9 | Mute |
| FN + F10 | Volume Down |
| FN + F11 | Volume Up |
| FN + F12 | Lock Keyboard (Windows Key Lock) |
| FN + SCRLK | Switch between 6-key and full-key anti-ghosting. |
| FN + INS | Change Backlight Effect Mode |
| FN + DEL | Change Backlight Color (if applicable to mode) |
| FN + Home | Custom Backlight Mode Recording |
| FN + End | Save Custom Backlight Mode |
| FN + PGUP | Increase Backlight Brightness |
| FN + PGDN | Decrease Backlight Brightness |
| FN + Arrow Keys | Adjust Backlight Effect Speed/Direction |

Figure 3: Multimedia hotkeys (F1-F12) accessible via FN key combinations.

Figure 4: Illustration of the Outemu swappable switch mechanism and included tools.
Maintenance
Proper maintenance ensures the longevity and performance of your keyboard.
- Cleaning:
- Use a soft, dry cloth to wipe down the keyboard surface regularly.
- For dust and debris between keycaps, use compressed air.
- To clean keycaps, gently remove them using the keycap puller (if included) and wash with mild soap and water. Ensure they are completely dry before reattaching.
- Switch Care:
- If a switch feels inconsistent, it can be replaced using the switch puller. Ensure you use compatible Outemu switches.
- Avoid spilling liquids on the keyboard. If a spill occurs, immediately disconnect the keyboard, dry it thoroughly, and allow it to air dry completely before reconnecting.
- Storage: When not in use for extended periods, store the keyboard in a clean, dry environment away from direct sunlight and extreme temperatures.
Troubleshooting
If you encounter issues with your Cosmic Byte CB-GK-28 keyboard, refer to the following common solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Keyboard not responding | Loose USB connection, faulty USB port, driver issue. | Ensure the USB cable is securely connected. Try a different USB port. Restart your computer. Check Device Manager for driver issues. |
| Specific keys not working | Dust/debris under keycap, faulty switch. | Remove the keycap and clean the area with compressed air. If the issue persists, the switch may need to be replaced using the switch puller and a new Outemu switch. |
| Backlight not working or incorrect | Backlight settings, software conflict. | Press FN + PGUP to increase brightness. Use FN + INS to cycle through backlight modes. Ensure no conflicting software is running. |
| Keys "ghosting" or not registering all presses | Anti-ghosting setting. | Press FN + SCRLK to toggle between 6-key and full-key anti-ghosting modes. |
| Windows key is disabled | Windows key lock activated. | Press FN + F12 to enable/disable the Windows key lock. |
If the problem persists after trying these solutions, please contact Cosmic Byte customer support.
Specifications
| Feature | Detail |
|---|---|
| Brand | Cosmic Byte |
| Model Number | CB-GK-28 |
| Series | Vanth |
| Colour | Black |
| Keyboard Type | Mechanical Gaming Keyboard |
| Switch Type | Outemu Red Mechanical (Swappable) |
| Key Lifespan | 50 million+ operations per key |
| Number of Keys | 104 |
| Anti-Ghosting | Full Key Anti-Ghosting (switchable to 6-key) |
| Backlight | Rainbow LED (20 effects, 8 game modes, adjustable brightness/speed) |
| Polling Rate | 1000 Hz |
| Keycaps | Injection Molded Double-shot Color Keycaps |
| Connectivity | USB-A |
| Compatible Devices | Laptop, PC |
| Operating System | Windows 10 (and compatible OS) |
| Product Dimensions (LxWxH) | 10 x 10 x 10 cm |
| Item Weight | 670 g |
| Included Components | USB Cable, Key Puller, Switch Puller, 2 Spare Switches |
Warranty and Support
The Cosmic Byte CB-GK-28 Vanth Mechanical Keyboard comes with a 1 Year Warranty from the date of purchase.
For any product-related issues, technical assistance, or warranty claims, please contact Cosmic Byte customer care for faster resolution.
Cosmic Byte Customer Care: 1800 31300 7700
You can also visit the official Cosmic Byte store for more information and support: Cosmic Byte Store on Amazon.in
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