1. Introduction
The KeyTronicEMS 2MOUSEP2L Optical PS/2 Mouse is designed for reliable and precise cursor control. This optical mouse offers smooth navigation without the need for a mouse pad, utilizing advanced sensors to track movement on almost any surface. Its design is user-friendly for both right and left-handed individuals, featuring two buttons and a convenient scroll wheel for enhanced productivity.
This product adheres to European Union RoHS initiatives, ensuring environmentally responsible manufacturing.
2. Product Features
- Optical Tracking: Utilizes optical sensors for precise and smooth cursor movement on various surfaces, eliminating the need for a mouse pad.
- No Mouse Ball: Designed without a traditional mouse ball, reducing dirt accumulation and simplifying maintenance.
- Ergonomic Design: Improved shape for comfortable use by both right-handed and left-handed users.
- Two Buttons with Scroll Wheel: Standard left and right click functionality complemented by a scroll wheel for easy document and web navigation.
- PS/2 Connectivity: Connects via a PS/2 port, suitable for compatible computer systems.
- RoHS Compliant: Manufactured in accordance with European Union Restriction of Hazardous Substances directives.

Figure 1: KeyTronicEMS 2MOUSEP2L Optical PS/2 Mouse. This image shows the black, wired optical mouse with the "KEY TRONIC" logo visible on its surface, featuring a scroll wheel between the two primary buttons.
3. Setup
- Identify the PS/2 Port: Locate the round PS/2 mouse port on the back of your computer. It is typically green and may have a mouse icon next to it.
- Connect the Mouse: Align the PS/2 connector of the mouse with the port on your computer. Gently push the connector into the port until it is securely seated.
- Power On Computer: If your computer is already on, it is recommended to restart it after connecting the mouse for proper driver recognition. If off, power it on.
- Driver Installation: Most modern operating systems will automatically detect and install the necessary drivers for a PS/2 mouse. No additional software installation is typically required.
- Test Functionality: Once the computer has booted, move the mouse to check cursor movement and click the left and right buttons, and scroll the wheel to ensure proper operation.
4. Operating the Mouse
The KeyTronicEMS Optical PS/2 Mouse provides intuitive control for your computer.
- Moving the Cursor: Gently slide the mouse across a flat surface. The optical sensor will detect movement and translate it into cursor motion on your screen.
- Left-Click: Press the left button to select items, open files, or activate functions.
- Right-Click: Press the right button to open context menus, offering additional options for selected items.
- Scroll Wheel: Roll the scroll wheel forward or backward to navigate through documents, web pages, or other content vertically. The scroll wheel can also often be pressed down for a middle-click function, depending on software configuration.
5. Maintenance
Due to its optical design, the KeyTronicEMS mouse requires minimal maintenance.
- Cleaning: To clean the mouse, gently wipe its surface with a soft, slightly damp cloth. Avoid using harsh chemicals or abrasive materials.
- Optical Sensor: Ensure the optical sensor on the underside of the mouse remains clean and unobstructed for optimal performance. Do not attempt to disassemble the mouse.
- Surface: While the mouse works on most surfaces, a clean, non-reflective surface will provide the best tracking accuracy.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Cursor does not move or moves erratically. |
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| Buttons or scroll wheel are unresponsive. |
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7. Specifications
| Model Number | 2MOUSEP2L |
| Brand | KeyTronicEMS |
| Manufacturer | KEYTRONIC |
| Color | Black |
| Connectivity Technology | PS/2 |
| Movement Detection Technology | Optical |
| Special Feature | Scroll Wheel |
| Product Dimensions | 0.04 x 0.04 x 0.04 inches |
| Item Weight | 4 ounces |
8. Warranty Information
Specific warranty details for the KeyTronicEMS 2MOUSEP2L Optical PS/2 Mouse are not provided in this manual. For information regarding warranty coverage, terms, and conditions, please refer to the documentation included with your purchase or visit the official KeyTronicEMS website.
9. Customer Support
For technical assistance, troubleshooting beyond this manual, or general inquiries about your KeyTronicEMS product, please contact KeyTronicEMS customer support. Contact information can typically be found on the manufacturer's official website or on the product packaging.