1. Introduction
The Cooler Master SK622 is a compact 60% mechanical keyboard designed for versatility, offering both wired USB and wireless Bluetooth connectivity. It features low-profile mechanical RGB switches and an ergonomic design, suitable for various applications including work and gaming across Windows and Mac platforms. This manual provides instructions for setup, operation, maintenance, and troubleshooting.

Figure 1: Top-down view of the Cooler Master SK622 Mechanical Keyboard.
2. Package Contents
Please verify that all items are present in your package:
- Cooler Master SK622 Mechanical Keyboard
- USB-C to USB-A Cable
- User Manual (this document)
3. Setup
3.1 Wired Connection
- Connect the USB-C end of the provided cable to the keyboard's USB-C port.
- Connect the USB-A end of the cable to an available USB port on your computer.
- The keyboard will automatically be detected and ready for use.
3.2 Wireless Connection (Bluetooth)
- Ensure the keyboard is charged.
- Toggle the switch on the side or back of the keyboard to the Bluetooth mode.
- On your device (computer, smartphone, tablet), navigate to Bluetooth settings.
- Press and hold the Fn + Z, Fn + X, or Fn + C keys on the keyboard to enter pairing mode for one of the three available Bluetooth profiles. The LED indicator will flash.
- Select "Cooler Master SK622" from the list of available Bluetooth devices on your device.
- Once paired, the LED indicator on the keyboard will stop flashing and remain solid.
- To switch between paired Bluetooth devices, press Fn + Z, Fn + X, or Fn + C.
3.3 Charging the Keyboard
Connect the keyboard via the USB-C cable to a powered USB port on your computer or a USB wall adapter. The LED indicator will show charging status and turn off when fully charged. The keyboard includes 2 Lithium Ion batteries.

Figure 2: Angled view of the Cooler Master SK622 Mechanical Keyboard.
4. Operating Instructions
4.1 Basic Key Functions
The SK622 features a 60% layout. Standard alphanumeric keys function as labeled. Many keys have secondary functions accessed via the Fn key.
4.2 Function Layer (Fn Key)
Hold down the Fn key to access secondary functions printed on the keycaps. These include:
- F1-F12 Keys: Accessed via number row (e.g., Fn + 1 for F1).
- Media Controls: Play/Pause, Volume Up/Down, Mute.
- Lighting Controls: Adjust RGB effects, brightness, and color.
- Macro Recording: On-the-fly macro creation.
4.3 On-the-Fly System
The keyboard supports on-the-fly adjustments without software:
- Macro Recording: Press Fn + A to start recording, type your sequence, then press Fn + A again to stop. Assign the macro to a key by pressing it.
- Lighting Customization: Use Fn + various keys (refer to keycap legends) to change lighting modes, colors, and brightness.
4.4 Master+ Software
For advanced customization, including 16.7 million LED luminescence options, fine-tuning, and macro management, download the exclusive "Master+" software from the Cooler Master website. This software allows for comprehensive control over keyboard settings.
4.5 OS Compatibility
The SK622 is compatible with Windows and Mac operating systems. Use the Fn + Mac/Win key to switch between layouts if necessary.
5. Features
- Hybrid Connectivity: Supports both Bluetooth wireless and USB wired connections.
- Low-Profile Mechanical Switches: Equipped with Red Switches for a responsive typing experience.
- Compact 60% Layout: Space-saving design without a numeric keypad.
- On-the-Fly System: Allows macro registration and keyboard setup without software.
- Master+ Software Support: For advanced customization of macros and RGB lighting.
- Advanced Processor: Features a 32-bit ARM Cortex processor with N-key rollover for accurate keystroke recognition.
- RGB Backlighting: Per-key RGB illumination with various effects.
6. Maintenance
6.1 Cleaning
To clean your keyboard:
- Disconnect the keyboard from your computer.
- Use a soft, lint-free cloth slightly dampened with water or a mild cleaning solution to wipe the keycaps and chassis.
- For dust and debris between keys, use compressed air.
- Avoid harsh chemicals or abrasive materials.
6.2 Battery Care
To prolong battery life:
- Avoid fully discharging the battery frequently.
- Store the keyboard in a cool, dry place when not in use for extended periods.
- Charge the keyboard regularly, especially if it will be unused for a long time.
7. Troubleshooting
7.1 Keyboard Not Responding (Wired)
- Ensure the USB cable is securely connected to both the keyboard and the computer.
- Try a different USB port on your computer.
- Test the keyboard on another computer to rule out a computer-specific issue.
7.2 Bluetooth Connection Issues
- Ensure the keyboard is in Bluetooth mode and sufficiently charged.
- Make sure Bluetooth is enabled on your device.
- Remove the keyboard from your device's Bluetooth list and attempt to re-pair it.
- Try pairing with a different Bluetooth profile (Fn + Z, X, or C).
- Move the keyboard closer to your device to reduce interference.
7.3 Keys Not Registering or Repeating
- Clean the affected key to ensure no debris is obstructing the switch.
- Perform a factory reset (refer to the Cooler Master website for specific instructions for your model).
- Ensure the keyboard firmware is up to date using the Master+ software.
7.4 Software (Master+) Issues
- Ensure you have the latest version of the Master+ software installed.
- Restart your computer and the software.
- Temporarily disable any antivirus or firewall software that might be interfering.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | SK-622-SKTR1-US |
| Dimensions (L x W x H) | 29.3 x 10.3 x 3.03 cm |
| Weight | 446 g |
| Connectivity | Bluetooth, USB-A (Wired) |
| Keyboard Type | Mechanical (Low-Profile Red Switches) |
| Backlight | RGB |
| OS Compatibility | Windows 10, Mac |
| Battery | 2 Lithium Ion batteries (4000 mAh) |
| Voltage | 5 Volts (DC) |
| Included Components | USB Cable |
9. Warranty and Support
Cooler Master products come with a limited warranty. For detailed warranty information, technical support, and frequently asked questions, please visit the official Cooler Master website:
You may also contact Cooler Master customer service for assistance with product issues or inquiries.







