1. Introduction
Thank you for choosing the Havit HV-MS989GT Wireless Optical Mouse. This manual provides essential information for the proper setup, operation, and maintenance of your new device. Please read it thoroughly before use and retain it for future reference.
2. Safety Information
- To protect the mouse, avoid using it on rough surfaces. A high-quality mouse pad is recommended for optimal performance and longevity.
- The optical sensor emits a strong light. Do not direct the light towards your eyes or the eyes of others.
- The mouse contains precise electronic components. Do not twist, disassemble, or attempt to repair the mouse yourself, as this may shorten its service life or cause damage.
- Keep the device away from water and other liquids.
- Do not expose the device to extreme temperatures.
3. Package Contents
Please check the package contents upon opening:
- Havit HV-MS989GT Wireless Optical Mouse
- USB Nano Receiver
- AA Battery (may be pre-installed or included separately)
- User Manual (this document)

Image 1: Havit HV-MS989GT Wireless Optical Mouse in its retail packaging.
4. Product Overview
The Havit HV-MS989GT is a 2.4 GHz wireless optical mouse designed for comfort and precision. It features an ambidextrous design, making it suitable for both left and right-handed users.
- Left Button: Standard click function.
- Right Button: Standard right-click function.
- Scroll Wheel: For scrolling documents and web pages. Can also function as a middle click button.
- Optical Sensor: Located on the underside for precise tracking.
- Battery Compartment: Located on the underside of the mouse.
- USB Nano Receiver Storage: A dedicated slot on the underside of the mouse for convenient storage of the receiver when not in use or during travel.

Image 2: Close-up view of the Havit HV-MS989GT mouse, highlighting the scroll wheel and main buttons.
5. Setup
- Install Battery: Open the battery compartment cover on the underside of the mouse. Insert one AA battery, ensuring correct polarity (+/-). Close the cover.
- Connect USB Receiver: Remove the USB Nano Receiver from its storage slot on the underside of the mouse. Plug the receiver into an available USB port on your computer (PC or laptop).
- Power On: The mouse should automatically power on and connect to the receiver. If there is an ON/OFF switch, ensure it is in the "ON" position. Your computer's operating system will typically install the necessary drivers automatically.
- Test Functionality: Move the mouse to check if the cursor responds on your screen. If not, refer to the Troubleshooting section.
6. Operating Instructions
- Wireless Operation: The mouse operates using 2.4 GHz wireless technology, providing a stable connection up to 8 meters from the USB receiver.
- Ambidextrous Design: The ergonomic design allows for comfortable use by both left-handed and right-handed individuals.
- Automatic Sleep Function: To conserve battery life, the mouse features an integrated automatic sleep function. If inactive for a period, it will enter a low-power sleep mode. To wake it up, simply move the mouse or click any button.
- DPI Sensitivity: The mouse provides a resolution range of 800-1600 DPI for precise and quick tracking.
- System Compatibility: Compatible with Windows 2000, XP, Vista, Windows 7, Windows 8, Windows 10, Linux, and Mac operating systems.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the mouse. Avoid using harsh chemicals or abrasive materials.
- Battery Replacement: When the mouse performance degrades or it stops responding, replace the AA battery. Ensure proper polarity when inserting the new battery.
- Receiver Storage: Always store the USB Nano Receiver in its dedicated slot on the mouse when traveling or not in use to prevent loss.
- Optimal Surface: For best tracking performance and to protect the optical sensor, use the mouse on a clean, smooth surface, preferably with a high-quality mouse pad.
8. Troubleshooting
| Problem | Possible Solution |
|---|---|
| Mouse not responding or cursor not moving. |
|
| Erratic cursor movement. |
|
| Mouse disconnects frequently. |
|
9. Specifications
| Brand | Havit |
| Model Number | HV-MS989GT |
| Mouse Type | Optical Mouse |
| Connectivity | Wireless (2.4 GHz) |
| Wireless Distance | 8 meters |
| Dimensions (L x W x H) | 104 × 58 × 37 mm |
| Number of Buttons | 4 |
| DPI Resolution | 800-1600 DPI |
| Key Life | 1,000,000 clicks |
| Power Supply | 1x AA Battery |
| Supported Operating Systems | Windows 2000, XP, Vista, Windows 7, Windows 8, Windows 10, Linux, Mac |
| Hand Orientation | Ambidextrous |
10. Warranty and Support
For warranty information, please refer to the warranty card included with your product or contact your retailer. You may also visit the official Havit website for support resources and contact information.
For additional assistance, please contact Havit customer support through their official channels.





