Introduction
This manual provides comprehensive instructions for the Logitech G400 Optical Gaming Mouse. It covers essential information regarding setup, operation, maintenance, troubleshooting, and technical specifications to ensure optimal performance and longevity of your device. The G400 mouse is designed for precision and responsiveness, featuring a high-precision optical engine and in-game sensitivity switching.
Product Features
- 3600 DPI Optical Engine: Provides precision targeting, pinpoint accuracy, and consistent response across various hand speeds.
- In-Game Sensitivity Switching: Allows instant adjustment between four DPI levels, from pixel-precise targeting to rapid maneuvers.
- 1 Millisecond Report Rate over USB: Ensures mouse movements are communicated to your PC at a fast 1000 reports per second.
- Ergonomic Design: Features a comfortable sculpted grip, low-friction feet, and rugged, long-life buttons built to withstand demanding use.
- Compatibility: Designed for PC gaming and compatible with Windows XP, Vista, and 7 operating systems.
Setup
Follow these steps to set up your Logitech G400 Optical Gaming Mouse:
- Connect the Mouse: Plug the USB connector of the Logitech G400 mouse into an available USB port on your computer.
- Driver Installation: Your operating system should automatically detect and install the necessary drivers. Allow a few moments for this process to complete.
- Install Logitech Gaming Software (Optional but Recommended): For full customization of DPI settings, button assignments, and profiles, download and install the Logitech Gaming Software from the official Logitech G website. This software enhances the mouse's functionality for gaming and productivity.

Operating Instructions
The Logitech G400 mouse features several buttons for enhanced control:
- Left and Right Click Buttons: Standard mouse functions for selection and context menus.
- Scroll Wheel: Used for vertical scrolling. It also functions as a middle click button.
- DPI Adjustment Buttons (+/-): Located below the scroll wheel, these buttons allow you to cycle through preset DPI sensitivity levels on the fly. The default settings are typically 400, 800, 1600, and 3600 DPI.
- Programmable Thumb Buttons: Two buttons located on the left side of the mouse (forward and back by default). These can be customized using the Logitech Gaming Software for various in-game commands or productivity shortcuts.


Maintenance
To maintain your Logitech G400 mouse in optimal condition:
- Cleaning: Use a soft, lint-free cloth slightly dampened with water or a mild cleaning solution to wipe the surface of the mouse. Avoid harsh chemicals or abrasive materials.
- Sensor Care: Keep the optical sensor on the underside of the mouse clean and free from dust or debris to ensure accurate tracking.
- Cable Management: Avoid sharp bends or excessive pulling on the USB cable to prevent damage.
Troubleshooting
If you encounter issues with your Logitech G400 mouse, try the following solutions:
- Mouse Not Detected: Ensure the USB cable is securely plugged into a working USB port. Try a different USB port or computer to rule out port-specific issues.
- Erratic Cursor Movement: Clean the optical sensor on the bottom of the mouse. Ensure you are using the mouse on a suitable surface (a mouse pad is recommended).
- Buttons Not Responding: Check if the Logitech Gaming Software is running and if any custom profiles are interfering. Try resetting the mouse settings to default within the software.
- Software Issues: Reinstall the Logitech Gaming Software. Ensure your operating system and drivers are up to date.
Specifications
| Feature | Detail |
|---|---|
| Brand | Logitech G |
| Model Name | G400 |
| Model Number | 910-002277 |
| Color | Black |
| Connectivity Technology | USB |
| Movement Detection Technology | Optical |
| Number of Buttons | 7 |
| Hand Orientation | Right |
| Compatible Devices | Personal Computer |
| Operating System | Windows (XP, Vista, 7) |
| Mouse Maximum Sensitivity | 3600 Dots per Inch (DPI) |
| Item Weight | 133 Grams |
Warranty and Support
The Logitech G400 Optical Gaming Mouse is covered by Logitech's standard manufacturer warranty. For specific warranty terms, duration, and to register your product, please visit the official Logitech G support website. You can also find drivers, software, and frequently asked questions (FAQs) there.
For technical assistance or further inquiries, please contact Logitech G customer support through their official channels.