Introduction
The Logitech G403 Hero 25K Gaming Mouse is engineered for advanced gaming performance, featuring the next-generation Hero 25K sensor. This mouse combines a comfortable, ergonomic design with customizable features, including Lightsync RGB lighting and six programmable buttons. It is designed to provide precise tracking and responsiveness for an enhanced gaming experience.

Image: Top-down view of the Logitech G403 Hero Gaming Mouse, showcasing its black finish, scroll wheel, and illuminated 'G' logo.
What's in the Box
Upon unboxing your Logitech G403 Hero Gaming Mouse, please verify that all the following components are included:
- G403 HERO Gaming Mouse
- 10g Optional Weight
- User Documentation

Image: The underside of the Logitech G403 Hero mouse with the removable cover for the 10g optional weight, illustrating the contents of the product package.
Key Features
The Logitech G403 Hero Gaming Mouse is equipped with several features designed to enhance your gaming and computing experience:
- Hero 25K Sensor: Features Logitech's most advanced sensor with 1:1 tracking, 400+ IPS, and a DPI range of 100-25,600. This sensor provides zero smoothing, filtering, or acceleration for precise control.
- Lightsync RGB Lighting: Full spectrum RGB lighting that can respond to in-game action, audio, or screen color. Customize lighting effects from 16.8 million colors using G HUB software.
- Comfort and Durability: Lightweight at 87g, with a contoured design that molds comfortably to your hand. Rubber side grips provide enhanced control. An optional 10g removable weight allows for personalized tuning.
- Programmable Buttons: Six programmable buttons can be configured via Logitech G HUB software to simplify in-game actions and macros.
- On-the-Fly DPI Shifting: Program and switch between five sensitivity settings, ranging from 100 to 25,600 DPI, directly from the mouse.
- Advanced Gaming Performance: Offers an 8x faster report rate (1ms) compared to standard mice, with spring button tensioning for improved response and reduced force.

Image: The underside of the Logitech G403 Hero mouse, pointing out the location of the Hero 25K sensor for accurate tracking.

Image: The Logitech G403 Hero mouse illuminated with Lightsync RGB, demonstrating its customizable lighting capabilities.

Image: Side profile of the Logitech G403 Hero mouse, emphasizing its contoured shape and rubber side grips for comfortable handling.
Setup
Follow these steps to set up your Logitech G403 Hero Gaming Mouse:
- Connect the Mouse: Plug the USB cable of the G403 Hero mouse into an available USB port on your computer.
- Install Logitech G HUB Software: For full customization and access to all features, download and install the Logitech G HUB software from the official Logitech website (logitechg.com/ghub). This software allows you to configure DPI settings, program buttons, and customize Lightsync RGB.
- Optional Weight Installation: If desired, insert the 10g optional weight into the designated slot on the underside of the mouse.

Image: Screenshot of the Logitech G HUB software interface, showing options for Lightsync RGB customization, including color selection and effects.
Operating Instructions
Understanding the functions of your G403 Hero mouse will help you optimize its use:
- Left and Right Click: Standard mouse functions.
- Scroll Wheel: Used for vertical scrolling. The scroll wheel also functions as a clickable middle button.
- DPI Cycle Button: Located behind the scroll wheel, this button allows you to cycle through your pre-set DPI sensitivity levels. You can configure these levels in Logitech G HUB.
- Side Buttons (G4/G5): Two thumb buttons on the left side of the mouse are programmable. By default, these may function as forward and back in web browsers. Customize their functions in G HUB.
- Lightsync RGB Customization: Use the Logitech G HUB software to personalize the RGB lighting effects, colors, and synchronization with other Logitech G devices.

Image: Top view of the Logitech G403 Hero mouse, illustrating the placement of the left/right click buttons, scroll wheel, DPI button, and side buttons.
Maintenance
Proper maintenance ensures the longevity and optimal performance of your gaming mouse:
- Cleaning: Use a soft, dry, lint-free cloth to wipe the surface of the mouse. For stubborn dirt, slightly dampen the cloth with water. Avoid using harsh chemicals or abrasive materials.
- Sensor Cleaning: Occasionally inspect the optical sensor on the underside of the mouse for dust or debris. Use a can of compressed air to gently clear any obstructions. Do not touch the sensor directly.
- Cable Care: Avoid sharply bending or twisting the mouse cable to prevent internal damage.
Troubleshooting
If you encounter issues with your Logitech G403 Hero Gaming Mouse, consider the following troubleshooting steps:
| Problem | Possible Solution |
|---|---|
| Mouse not responding | Ensure the USB cable is securely plugged into a working USB port. Try a different USB port or a different computer to isolate the issue. |
| Inaccurate tracking or cursor erratic behavior | Clean the optical sensor on the underside of the mouse. Ensure you are using the mouse on a clean, uniform surface (e.g., a mouse pad). Avoid highly reflective or transparent surfaces. |
| Buttons or scroll wheel not working | Check Logitech G HUB software for any conflicting profiles or assignments. Reinstall the G HUB software if necessary. Ensure no physical obstructions are present. |
| Lightsync RGB not working or incorrect colors | Verify G HUB software is running and updated. Check lighting settings within G HUB. Ensure no other software is conflicting with RGB control. |
| Mouse not detected by G HUB | Ensure the mouse is connected. Restart your computer. Reinstall Logitech G HUB software. Check for any pending Windows/macOS updates or driver conflicts. |
If these steps do not resolve your issue, please refer to the official Logitech support resources.
Specifications
Detailed technical specifications for the Logitech G403 Hero Gaming Mouse:
| Attribute | Detail |
|---|---|
| Brand | Logitech |
| Series | Logitech G403 HERO Gaming Mouse |
| Item Model Number | 910-005630 |
| Hardware Platform | Mac, PC |
| Operating System | Mac OS X 10.11 El Capitan, Windows 7 and later |
| Item Weight | 6.4 ounces (approx. 181g) |
| Product Dimensions (LxWxH) | 2 x 4.6 x 6.9 inches (approx. 5.08 x 11.68 x 17.53 cm) |
| Color | Black |
| Power Source | Corded Electric |
| Connectivity Technology | USB |
| Special Feature | Lightweight, Programmable Buttons |
| Movement Detection Technology | Optical (HERO 25K Sensor) |
Warranty and Support
Logitech products typically come with a limited hardware warranty. For specific warranty details, terms, and conditions, please refer to the official documentation included with your product or visit the Logitech support website.
For further assistance, product registration, or to download the latest software and drivers, please visit the official Logitech support resources:
- Official User Manual (PDF): Download PDF
- Logitech Brand Store: Visit Store
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