Introduction
Thank you for choosing the PORLEI Wired Trackball Mouse. This manual provides detailed instructions for setting up, operating, maintaining, and troubleshooting your new trackball mouse. Designed for ergonomic comfort and precision, this device aims to enhance your productivity and reduce strain during extended use.

Setup
The PORLEI Wired Trackball Mouse is designed for simple plug-and-play functionality, requiring no additional drivers for most operating systems.
Connecting the Mouse
- Locate an available USB-A port on your computer (PC, Laptop, Mac, Windows system).
- Plug the USB-A connector of the mouse cable into the USB port. The mouse also includes a USB-C adapter for broader compatibility.
- Wait for your operating system to recognize the device. This usually happens automatically within a few seconds.
- The mouse is now ready for use.

Operating Instructions
Buttons and Functions
The PORLEI Wired Trackball Mouse features multiple buttons for enhanced control and navigation:
- Left Click Button: Standard primary click function.
- Right Click Button: Standard secondary click function.
- Precision Scroll Wheel: Used for vertical scrolling through documents and web pages. Also functions as a clickable middle button.
- DPI Button: Cycles through different DPI sensitivity levels.
- Forward/Backward Buttons: Located near the thumb trackball, these buttons allow for quick navigation forward and backward in web browsers or file explorers. Note: These buttons are non-programmable and are not compatible with Mac OS systems.

Adjusting DPI Sensitivity
The mouse offers 5 adjustable DPI (Dots Per Inch) levels to suit various tasks, from precise graphic design to fast-paced browsing. Press the DPI button to cycle through the following settings:
- 100 DPI
- 200 DPI
- 400 DPI
- 800 DPI
- 1200 DPI
A higher DPI setting results in faster cursor movement across the screen, while a lower DPI provides more precise control.

Ergonomics and Comfort
The sculpted ergonomic shape of the trackball mouse is designed to naturally fit your hand, promoting a relaxed hand and arm posture. Smooth thumb control of the trackball helps reduce muscle pain and wrist stiffness, providing all-day comfort.


RGB Lighting
The mouse features cool RGB lighting that adds a vibrant aesthetic to your workspace. This lighting can be customized or turned off according to your preference.
Maintenance
Cleaning the Trackball
To ensure smooth and precise tracking, it is recommended to periodically clean the trackball and its housing.
- Gently push the trackball out from the bottom of the mouse.
- Use a soft, lint-free cloth to wipe the trackball clean.
- Carefully clean the inside of the trackball housing, removing any dust or debris from the optical sensor and support points.
- Reinsert the trackball into its housing until it clicks securely into place.

Troubleshooting
If you encounter issues with your PORLEI Wired Trackball Mouse, please refer to the following common solutions:
- Mouse not responding: Ensure the USB cable is securely plugged into a working USB port on your computer. Try a different USB port or restart your computer.
- Cursor movement is erratic or sticky: The trackball or its internal sensors may be dirty. Refer to the 'Cleaning the Trackball' section for maintenance instructions.
- DPI button not changing sensitivity: Ensure the mouse is properly connected and recognized by your system. Press the DPI button firmly.
- Forward/Backward buttons not working on Mac OS: These buttons are not compatible with Mac OS systems. Their functionality is primarily for Windows-based systems.
- RGB lighting not working: Check the mouse's connection. If the lighting is off, it might be toggled off. Refer to the product's specific instructions for RGB control if available.
If the problem persists after trying these steps, please contact customer support.
Specifications
| Feature | Detail |
|---|---|
| Brand | PORLEI |
| Model | TM551 |
| Connectivity Technology | Wired USB (USB-A with USB-C adapter) |
| DPI Levels | 100, 200, 400, 800, 1200 |
| Product Dimensions | 5.71 x 2.28 x 4.41 inches |
| Item Weight | 7.8 ounces |
| Special Features | RGB Lighting, Lightweight, Ergonomic Design, Removable Trackball |
| Movement Detection Technology | Optical Trackball |
| Cable Length | 1.8 meters (approx. 70 inches) |
| Compatibility | Windows, Mac OS, Laptops, Desktops |
Warranty and Support
Warranty Information
PORLEI products are manufactured with high-quality standards. This product is covered by a standard manufacturer's warranty against defects in materials and workmanship. Please retain your proof of purchase for warranty claims. Specific warranty duration and terms may vary by region and retailer.
Customer Support
For technical assistance, troubleshooting, or warranty inquiries, please contact PORLEI customer support through the retailer's platform or the official PORLEI website. Please have your product model (TM551) and purchase details ready when contacting support.