Monoprice 115904
Monoprice Essential USB Keyboard User Manual
Model: 115904
Introduction
The Monoprice Essential USB Keyboard is designed for reliable and comfortable typing. Featuring an ideally spaced key layout, quiet key switch action, and durable construction, this keyboard is a perfect complement to any desktop or laptop setup. Its slim, stylish profile and standard layout ensure fast, accurate typing without unnecessary distractions. This manual will guide you through the installation, operation, and maintenance of your new keyboard.

Figure 1: Monoprice Essential USB Keyboard, black, showing the full layout and wired connection.
Setup Guide
Package Contents
Please verify that all items are present in the package:
- Monoprice Essential USB Keyboard (Model 115904)
Connecting the Keyboard
The Monoprice Essential USB Keyboard features simple plug-and-play connectivity.
- Locate an available USB port on your computer (PC or Laptop).
- Insert the USB connector of the keyboard firmly into the USB port.
- The operating system (e.g., Windows 10 or later) will automatically detect and install the necessary drivers. No additional software installation is required.
- Your keyboard is now ready for use.

Figure 2: The Monoprice Essential USB Keyboard connected to a computer setup, demonstrating its compact design on a desk.
Operating Instructions
Basic Operation
The Monoprice Essential USB Keyboard is a standard 104-key keyboard designed for general computing tasks. It operates immediately upon connection to a compatible USB port, requiring no special setup or configuration.
Key Layout and Functions
The keyboard features a familiar standard layout, ensuring a comfortable and efficient typing experience. It includes:
- Standard QWERTY Layout: For intuitive typing.
- Full Complement of Function Keys (F1-F12): Located at the top row for various system and application shortcuts.
- 10-Key Numeric Keypad: On the right side for efficient data entry and calculations.
- Indicator Lights: For Num Lock, Caps Lock, and Scroll Lock status.

Figure 3: Overhead view of the Monoprice Essential USB Keyboard, highlighting the standard QWERTY layout, function keys, and numeric keypad.
Maintenance and Care
To ensure the longevity and optimal performance of your Monoprice Essential USB Keyboard, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to wipe down the keyboard surface. For deeper cleaning, slightly dampen the cloth with water or a mild, non-abrasive cleaner. Avoid spraying liquids directly onto the keyboard.
- Dust Removal: Use compressed air to remove dust and debris from between the keys.
- Avoid Spills: Keep liquids away from the keyboard to prevent damage to internal components.
- Storage: When not in use, store the keyboard in a clean, dry environment away from extreme temperatures.
- Cable Care: Do not bend or crimp the USB cable excessively.

Figure 4: Side profile of the Monoprice Essential USB Keyboard, illustrating its slim design and ergonomic angle.
Troubleshooting
Common Issues and Solutions
| Problem | Possible Cause | Solution |
|---|---|---|
| Keyboard is not responding. | Loose USB connection, faulty USB port, or driver issue. | Ensure the USB cable is securely plugged in. Try a different USB port on your computer. Restart your computer. |
| Certain keys are not working. | Debris under the key, or key mechanism damage. | Use compressed air to clear debris. If the issue persists, the key mechanism may be damaged. |
| Typing produces incorrect characters. | Incorrect keyboard language/layout settings in the operating system. | Check your computer's operating system settings for keyboard language and layout. |
| Num Lock/Caps Lock indicator lights are off. | Num Lock/Caps Lock is not active. | Press the Num Lock or Caps Lock key to activate the function and illuminate the indicator light. |
Product Specifications
| Feature | Detail |
|---|---|
| Brand | Monoprice |
| Model Number | 115904 |
| Connectivity Technology | USB (Wired) |
| Number of Keys | 104 |
| Color | Black |
| Compatible Devices | PC, Laptop |
| Operating System Compatibility | Windows 10 and later (Plug-and-Play) |
| Item Weight | 1.1 pounds (approx.) |
| Product Dimensions (LxWxH) | 17.7 x 6.1 x 1.4 inches (approx.) |
| Power Source | Corded Electric (USB powered) |
| Included Components | USB Keyboard |
Warranty and Support
Monoprice products are designed for reliability and performance. For specific warranty information regarding your Monoprice Essential USB Keyboard (Model 115904), please refer to the warranty card included with your purchase or visit the official Monoprice website.
For technical support, troubleshooting assistance beyond this manual, or to inquire about replacement parts, please contact Monoprice Customer Service:
- Monoprice Official Website: www.monoprice.com
- Refer to the 'Support' or 'Contact Us' section on the website for the most current contact methods (phone, email, chat).
Please have your product model number (115904) and purchase details ready when contacting support.
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