1. Product Overview
The Xtrfy M42 RGB Ultra Light Gaming Mouse is engineered for optimal gaming performance, combining an ultra-light construction with state-of-the-art components. Its versatile and symmetrical design, featuring interchangeable parts, allows for size adjustment to perfectly fit any gamer's hand and grip style. This manual provides comprehensive instructions for setting up, operating, and maintaining your M42 gaming mouse.

Figure 1: Xtrfy M42 RGB Ultra Light Gaming Mouse (Top View)
This image displays the Xtrfy M42 mouse from a top-down perspective, highlighting its lightweight honeycomb design and vibrant RGB lighting visible through the shell and along the sides.
2. Key Features
- Adjustable Symmetrical Shape: Designed for various grip styles (palm, claw, fingertip) with interchangeable parts to customize size and fit.
- Ultra-Light Construction: Built to minimize weight while maintaining durability for heavy daily use.
- High-Performance Sensor: Equipped with Pixart's highest-performing gaming sensor, the 3389, for precise tracking.
- Durable Switches: Features pro player-optimized switches rated for 20,000,000 clicks.
- Modular Shell: Includes two different sized shells for personalized comfort.
- Effortless Glide: 100% PTFE skates with rounded edges ensure smooth movement.
- Enhanced Grip: Matte UV coating and hole structure provide a steady grip and improved airflow.
- Customizable RGB Illumination: Personalize your mouse with various LED effects, adjustable brightness, and color choices directly on the mouse.
- Designed in Sweden: Reflects quality and thoughtful design.

Figure 2: Interchangeable Shells for Custom Fit
This image illustrates the modular design of the Xtrfy M42, showing the mouse body alongside its two interchangeable back shells, which allow users to adjust the mouse's size and shape for a personalized grip.
3. Setup Guide
3.1 Connecting the Mouse
- Unpack the Xtrfy M42 RGB Ultra Light Gaming Mouse from its packaging.
- Locate an available USB port on your computer.
- Plug the USB connector of the mouse cable into the USB port.
- The mouse will typically be recognized automatically by your operating system, and drivers will install if necessary.
3.2 Adjusting the Shape (Interchangeable Parts)
The M42 comes with two interchangeable back shells to adapt to different hand sizes and grip preferences. To change the shell:
- Gently lift the currently attached back shell from the mouse. It is held in place by magnets.
- Select the desired shell (larger or smaller hump).
- Align the new shell with the magnetic points on the mouse body and gently press it into place until it clicks securely.

Figure 3: Xtrfy M42 Angled View
This image provides an angled view of the Xtrfy M42, showcasing the intricate honeycomb pattern across its surface and the dynamic RGB lighting that illuminates the interior and edges of the mouse.
4. Operating Instructions
4.1 Basic Functions
The Xtrfy M42 operates as a standard USB gaming mouse. It features left-click, right-click, scroll wheel (middle click), and two side buttons.
4.2 DPI Adjustment
The DPI (Dots Per Inch) sensitivity can be adjusted directly on the mouse without the need for software. The DPI switch button is located on the underside of the mouse.
- Flip the mouse over to access its underside.
- Press the small button labeled "DPI" to cycle through the available DPI settings.
- Each press will change the DPI, indicated by a specific LED color on the mouse. Refer to the product's official website or packaging for the exact DPI values corresponding to each color.

Figure 4: Underside of Xtrfy M42 with DPI Switch
This image shows the bottom of the Xtrfy M42 mouse, clearly displaying the smooth PTFE skates, the optical sensor, and the dedicated button for adjusting DPI settings.
4.3 RGB Illumination Control
The RGB lighting can be customized directly on the mouse. Specific button combinations are used to change effects, colors, and brightness.
- Changing LED Effects: Consult the official Xtrfy M42 product page or included quick guide for the specific button combination (e.g., a combination of main clicks and side buttons) to cycle through lighting modes.
- Adjusting Brightness: There may be a dedicated button or combination to increase/decrease brightness.
- Turning Illumination Off: A specific combination will allow you to disable the RGB lighting.

Figure 5: Xtrfy M42 Front View with RGB
This image captures the front of the Xtrfy M42 mouse, emphasizing its durable braided cable and the dynamic RGB lighting that emanates from the front edge, adding to its aesthetic appeal.
4.4 Official Product Video
Video 1: Xtrfy M42 Gaming Mouse Overview
This official video from Xtrfy provides a visual overview of the M42 Gaming Mouse, demonstrating its key features, design, and customizable aspects. It highlights the mouse's ambidextrous shape, interchangeable parts, and various color editions.
5. Maintenance
5.1 Cleaning
To ensure optimal performance and longevity, regular cleaning of your Xtrfy M42 mouse is recommended.
- Use a soft, dry cloth to wipe down the surface of the mouse.
- For the honeycomb holes, a can of compressed air can be used to dislodge dust and debris. Avoid using liquid cleaners directly on the mouse.
- Clean the optical sensor on the underside periodically with a cotton swab lightly dampened with isopropyl alcohol, ensuring it is dry before use.
5.2 Skates Replacement
The M42 comes with extra PTFE skates. If your current skates show significant wear and tear, affecting glide performance, you can replace them.
- Carefully peel off the old skates using a thin, non-abrasive tool.
- Ensure the surface where the skates were is clean and free of adhesive residue.
- Peel the backing from the new skates and carefully apply them to the designated areas on the mouse's underside, pressing firmly to ensure adhesion.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Mouse not responding | Loose USB connection, faulty USB port, driver issue. | Ensure USB cable is securely plugged in. Try a different USB port. Restart your computer. Check Device Manager for driver issues. |
| DPI not changing | Incorrect button press, mouse malfunction. | Ensure you are pressing the correct DPI button on the underside of the mouse. Refer to section 4.2. |
| RGB lighting not working/changing | Incorrect button combination, mouse malfunction. | Verify the correct button combinations for RGB control. Refer to section 4.3. |
| Mouse movement is erratic or jumpy | Dirty sensor, unsuitable mouse pad surface. | Clean the optical sensor (see section 5.1). Use a clean, uniform mouse pad surface. |
| Buttons not registering clicks consistently (e.g., double-clicking) | Switch wear, dust/debris under button. | This can indicate switch wear over time. If under warranty, contact Xtrfy support. For minor issues, try compressed air around the button. |
| Scroll wheel squeaky or inconsistent | Dust/debris, mechanical issue. | Use compressed air to clear debris around the scroll wheel. If the issue persists, it may be a mechanical fault. |
7. Technical Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 4.65 x 2.48 x 1.5 inches |
| Item Weight | 2.08 ounces |
| ASIN | B08PDDGRQB |
| Item Model Number | M42-RGB-BLACK |
| Batteries | 1 Lithium Ion batteries required (included) |
| Connectivity Technology | USB |
| Movement Detection Technology | Optical |
| Special Feature | Interchangeable parts for adjusting size |
| Color | Black |
| Manufacturer | XTRFY |
| Date First Available | December 7, 2020 |
| What's in the Box | 2 x mouse shell sizes |
8. Warranty and Support
For warranty information, technical support, or further inquiries regarding your Xtrfy M42 RGB Ultra Light Gaming Mouse, please refer to the official Xtrfy website or contact their customer service directly.
You can visit the official Xtrfy Store on Amazon for more product information and support: Xtrfy Amazon Store





