1. Introduction
Thank you for choosing the MIKUSO Large Print Backlit Wired Computer Keyboard. This keyboard is designed to provide enhanced visibility and comfort for users, featuring oversized, illuminated keys and an integrated wrist rest. This manual will guide you through the setup, operation, and maintenance of your new keyboard to ensure optimal performance and longevity.
2. Product Features
- Large Print Keys: Features oversized fonts, approximately 4 times larger than standard keyboard fonts, for improved readability and reduced typing errors. Ideal for users with visual impairments, seniors, or anyone preferring clearer key legends.
- White LED Backlighting: Equipped with a white LED backlight for clear visibility in low-light environments. The backlight can be easily toggled on or off with a dedicated key.
- Ergonomic Design with Wrist Rest: Includes an integrated wrist rest to reduce hand fatigue during extended typing sessions. The full-size 104-key QWERTY layout with a numeric keypad is suitable for various applications.
- Protective Cover: Comes with an original protective cover designed to prevent damage from spills, dust, and other contaminants, extending the lifespan of the keys and maintaining keyboard cleanliness.
- Plug and Play Connectivity: Simple USB wired connection requires no software installation or battery charging.
- Wide Compatibility: Compatible with Windows 2000/XP/7/8/10, Vista, and Mac OS (note: multimedia keys may have limited functionality on Mac OS).
- Multimedia Shortcut Keys: 12 combination shortcut keys (Fn+) for quick access to media controls and common applications.

Figure 1: MIKUSO Large Print Backlit Wired Computer Keyboard.

Figure 2: Illustration of extra large characters on the keyboard keys, showing a comparison to standard font size.
3. Setup Instructions
- Unpack the Keyboard: Carefully remove the keyboard and any included accessories from its packaging.
- Connect to Computer: Locate an available USB-A port on your computer (desktop, laptop, or PC). Insert the USB connector of the keyboard firmly into the USB port.
- Driver Installation (Automatic): The keyboard is plug-and-play. Your operating system (Windows, Mac OS) will automatically detect and install the necessary drivers. This process usually takes a few seconds.
- Verify Functionality: Once connected, open a text editor or any application that accepts text input and test typing to ensure all keys are functioning correctly.
- Adjust Backlight: If the backlight is not on, press the dedicated backlight key (often labeled with a light bulb icon or "SL" for Scroll Lock, which sometimes doubles as backlight toggle) to activate it.

Figure 3: The keyboard connected via its USB cable to a computer, illustrating the plug-and-play setup.
4. Operating Instructions
4.1 Backlight Control
The keyboard features a white LED backlight for improved visibility. To control the backlight:
- Turn On/Off: Press the SL (Scroll Lock) key, which also functions as the backlight toggle. Each press will switch the backlight between on and off states.

Figure 4: The keyboard with its white LED backlight illuminated, highlighting the "SL" key for backlight control.
4.2 Multimedia Function Keys
The keyboard includes 12 multimedia shortcut keys accessible by pressing the Fn key in combination with the F1-F12 keys. These functions are:
| Key Combination | Function |
|---|---|
| Fn + F1 | Music Player |
| Fn + F2 | Volume Down |
| Fn + F3 | Volume Up |
| Fn + F4 | Mute |
| Fn + F5 | Previous Track |
| Fn + F6 | Next Track |
| Fn + F7 | Play/Pause |
| Fn + F8 | Stop |
| Fn + F9 | Browser |
| Fn + F10 | |
| Fn + F11 | My Computer |
| Fn + F12 | Favorites |

Figure 5: Diagram illustrating the multimedia function keys (Fn + F1-F12) and their corresponding actions.
4.3 Using the Wrist Rest and Adjustable Feet
The integrated wrist rest is designed to provide ergonomic support. For additional comfort, the keyboard features adjustable feet on the underside. Flip these feet out to change the typing angle to your preference.

Figure 6: A user's hands positioned comfortably on the keyboard's integrated wrist rest, demonstrating ergonomic design.
5. Maintenance and Care
Proper maintenance ensures the longevity and optimal performance of your keyboard.
- Cleaning: To clean the keyboard, first disconnect it from your computer. Use a soft, damp cloth with a mild cleaning solution (e.g., water with a small amount of dish soap) to wipe down the keys and surfaces. Avoid excessive moisture. For dust and debris between keys, use compressed air.
- Using the Protective Cover: The included protective cover is designed to shield the keyboard from dust, spills, and pet hair. Place the cover over the keyboard when not in use, especially in environments prone to contaminants.
- Spill Protection: While the keyboard is designed with some spill resistance due to the cover, it is not fully waterproof. Avoid direct exposure to large amounts of liquid. If a spill occurs, immediately disconnect the keyboard, wipe it dry, and allow it to air dry completely before reconnecting.
- Storage: Store the keyboard in a cool, dry place away from direct sunlight and extreme temperatures.

Figure 7: The keyboard with its transparent protective cover in place, demonstrating protection against liquid spills and dust.
6. Troubleshooting
If you encounter issues with your MIKUSO keyboard, please refer to the following common solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Keyboard not responding / Keys not working | Loose USB connection, faulty USB port, driver issue, keyboard malfunction. |
|
| Backlight not turning on | Backlight is off, keyboard not powered. |
|
| Multimedia keys not working on Mac OS | Limited compatibility with Mac OS. |
|
| Keyboard frequently disconnects | Loose connection, power issue, faulty cable/port. |
|
7. Product Specifications
| Feature | Detail |
|---|---|
| Brand | MIKUSO |
| Model Number | KB-099U |
| Connectivity Technology | USB-A, Wired |
| Keyboard Description | Membrane |
| Special Features | Backlit, Foldable (feet), Integrated Wrist Rest, Protective Cover (Waterproof/Dustproof design) |
| Backlight Color | Single Color (White LED) |
| Layout | Full-size 104-key QWERTY (US) with Numeric Keypad |
| Product Dimensions | 17.6 x 7 x 1.15 inches (449mm x 185mm x 36mm) |
| Item Weight | 1.3 pounds |
| Cable Length | Approximately 1.6 meters |
| Compatible Devices | Laptop, PC (Windows 2000/XP/7/8/10, Vista, Mac OS) |

Figure 8: Diagram showing the physical dimensions of the MIKUSO keyboard.
8. Warranty and Support
MIKUSO products are designed for reliability and performance. For warranty information or technical support, please refer to the contact details provided with your purchase documentation or visit the official MIKUSO website. Please have your model number (KB-099U) and purchase date available when contacting support.
For general inquiries or further assistance, you may also refer to the seller's contact information on the platform where the product was purchased.