Introduction
This manual provides comprehensive instructions for the Rapoo 3900P 5G Wireless Ergonomic Programmable Laser Engine Mouse. It covers setup, operation, maintenance, and troubleshooting to ensure optimal performance and user experience. The Rapoo 3900P mouse features advanced 5G wireless transmission, an ergonomic design, and programmable functions for enhanced productivity.

Image: Side view of the Rapoo 3900P mouse, showcasing its ergonomic design for comfortable use.
Package Contents
- Wireless Mouse (Rapoo 3900P)
- Nano Receiver
- 1*AA Alkaline Battery (pre-installed)
- Quick Start Guide
Setup
1. Battery Installation
The Rapoo 3900P mouse comes with one AA alkaline battery pre-installed. If you need to replace the battery, open the battery compartment located on the underside of the mouse, insert a new AA battery, ensuring correct polarity, and close the compartment securely.
2. Connecting the Nano Receiver
Locate the Nano receiver, typically stored within the mouse's battery compartment or a dedicated slot. Plug the Nano receiver into an available USB port on your computer (desktop or laptop). The mouse should be automatically detected and configured by your operating system, usually without requiring additional drivers for basic functionality.
3. System Requirements
Ensure your computer meets the following minimum requirements for optimal performance:
- Operating System: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista
- Available USB Port
Operating the Mouse
1. 5G Wireless Transmission Technology
The Rapoo 3900P utilizes second-generation 5G wireless transmission technology. This technology operates on a different frequency band than common 2.4G wireless devices, such as Bluetooth and Wi-Fi, thereby minimizing interference and ensuring a stable, reliable connection for uninterrupted use.
2. DPI Adjustment
The mouse features adjustable DPI (Dots Per Inch) settings, allowing you to change cursor sensitivity. The available resolutions are 800 DPI and 1600 DPI. Use the dedicated DPI button, usually located near the scroll wheel, to cycle between these settings. This allows for precise control or faster cursor movement as needed for different tasks.

Image: Top view of the Rapoo 3900P mouse, highlighting the DPI button and scroll wheel for sensitivity adjustment.
3. Programmable Functions
The Rapoo 3900P mouse is programmable, allowing you to customize button functions to suit your workflow. To access and configure these settings, you will need to download and install the official Rapoo driver software from the Rapoo website. The software interface provides options for remapping buttons, creating macros, and adjusting other mouse parameters for personalized control.

Image: Screenshot of the Rapoo mouse driver software, illustrating the various programmable options for buttons and functions.
4. Scrolling Functionality
The scroll wheel on the Rapoo 3900P allows for vertical scrolling (up and down). Additionally, the mouse supports side-to-side scrolling, which can be useful for navigating wide documents or web pages. This feature enhances navigation and control within files, documents, and internet browsers.
Maintenance
1. Power Efficiency and Battery Life
The Rapoo 3900P features a laser engine technology designed for high power efficiency, consuming only 25% of the power compared to standard laser mice. This design extends battery life significantly, reducing the frequency of battery replacement and contributing to environmental sustainability.
2. Firmware Updates
To ensure optimal performance and access to the latest features, it is recommended to periodically check for and install firmware updates for your mouse. Firmware programs can be downloaded from the official Rapoo website. Follow the instructions provided with the firmware update tool carefully to avoid any issues during the update process.
Troubleshooting
- Mouse Not Responding: Ensure the Nano receiver is securely plugged into a working USB port. Check the battery level and replace if necessary. Try plugging the receiver into a different USB port or a different computer to isolate the issue.
- Intermittent Connection: The 5G wireless technology is designed to minimize interference. However, ensure there are no large metallic objects or other strong wireless transmitters directly between the mouse and the receiver that could obstruct the signal.
- Cursor Movement Issues: Clean the laser sensor on the underside of the mouse with a soft, dry cloth. Ensure you are using the mouse on a suitable surface; highly reflective or transparent surfaces may affect tracking performance. Adjust DPI settings if the cursor is too fast or too slow.
- Programmable Buttons Not Working: Verify that the Rapoo driver software is correctly installed and running. Check the settings within the software to ensure buttons are assigned to desired functions. If the software is not installed, download it from the official Rapoo website.
Specifications
| Feature | Description |
|---|---|
| Ergonomic Design | Yes |
| Programmable | Yes |
| Power Efficient | Yes |
| Working Mode | Laser Engine |
| Connection Type | 5.8GHz Wireless |
| Max. Acceleration | 20G |
| Resolution | 800 / 1600 adjustable DPI |
| Mouse Lifecycle | 20 Million Key-press |
| Power Supply | 1*AA alkaline battery |
| Dimensions (L*W*H) | 120(L)*76(W)*40(H) mm (+/- 0.5 mm) |
| Item Weight | 3.2 ounces |
| ASIN | B00NHUWVSE |
| Model Number | 14207-AR3900PWE-M56 |
| Date First Available | September 11, 2014 |

Image: Top-down view of the Rapoo 3900P mouse, illustrating its physical dimensions (length and width).
Warranty and Support
For warranty information, technical support, and driver downloads, please visit the official Rapoo website. You can find detailed product support, FAQs, and contact information for customer service there. Keep your purchase receipt for warranty claims and always refer to the official website for the most up-to-date information.





