1. Introduction
Thank you for choosing the AOC MS400 Wireless Mouse. This optical mouse is designed for reliable and comfortable use with notebooks, PCs, and laptops. Featuring 2.4G wireless technology and adjustable DPI settings, it offers precise control for various tasks. This manual provides detailed instructions for setup, operation, and maintenance to ensure optimal performance.
2. Package Contents
Ensure all items are present in the package:
- AOC MS400 Wireless Mouse
- USB Receiver (Nano Receiver)
- User Manual (This document)
- Warranty Card
3. Product Overview
The AOC MS400 Wireless Mouse combines a portable design with essential features for daily computing.

Image 3.1: Overview of the AOC MS400 Wireless Mouse highlighting its adjustable DPI, lightweight design, 2.4G wireless connectivity, and USB receiver.
Key Features:
- 2.4G Wireless Technology: Provides a stable and lag-free connection up to 33 feet (10 meters).
- Adjustable DPI: Cycle through 800, 1000 (default), and 1600 DPI settings for customized cursor sensitivity.
- Ergonomic Design: Contoured shape and textured grip sides reduce hand fatigue during extended use.
- Portable Nano Receiver: The compact USB receiver can be stored inside the mouse for convenience during travel.
- Universal Compatibility: Works with Windows, macOS, Linux, and Chromebooks.
4. Setup
Follow these steps to set up your AOC MS400 Wireless Mouse:
- Install Battery:
Open the battery compartment cover located on the underside of the mouse. Insert one AA battery (not included) according to the polarity indicators (+/-). Close the battery compartment cover securely.
Video 4.1: Demonstration of installing the AA battery and storing the USB receiver in the AOC MS400 mouse.
- Retrieve USB Receiver:
The Nano USB receiver is stored inside the mouse, next to the battery compartment. Gently pull it out.
- Connect Receiver:
Plug the USB receiver into an available USB Type-A port on your computer (laptop, PC, or Chromebook). The mouse is plug-and-play and should be recognized automatically by your operating system.

Image 4.1: The AOC MS400 Wireless Mouse in use, showing the USB receiver plugged into a laptop.
- Power On:
Locate the power switch on the underside of the mouse and slide it to the "ON" position.
Your mouse is now ready for use.
5. Operating Instructions
Basic Functions:
- Left Click: Primary selection and activation.
- Right Click: Accesses contextual menus.
- Scroll Wheel: Scroll up or down through documents and web pages. The scroll wheel also functions as a middle click button.
Adjusting DPI:
The AOC MS400 features an adjustable DPI button located behind the scroll wheel. Press this button to cycle through three sensitivity settings:
- 800 DPI: Slower cursor movement for precise tasks.
- 1000 DPI (Default): Standard cursor speed for general use.
- 1600 DPI: Faster cursor movement for quick navigation.

Image 5.1: Visual representation of the three adjustable DPI settings (800, 1000, 1600) available on the AOC MS400 mouse.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the mouse. Avoid using harsh chemicals or abrasive materials.
- Battery Replacement: Replace the AA battery when the mouse performance degrades or stops responding.
- Storage: When not in use, especially during travel, turn off the mouse and store the USB receiver inside its dedicated compartment to prevent loss.
7. Troubleshooting
| Problem | Solution |
|---|---|
| Mouse not responding |
|
| Erratic cursor movement |
|
| Connection issues |
|
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | MS400 |
| Connectivity | 2.4G Wireless (USB Type-A Nano Receiver) |
| Movement Detection Technology | Optical |
| Adjustable DPI | 800 / 1000 (default) / 1600 |
| Power Source | 1 x AA Battery (not included) |
| Product Dimensions (L x W x H) | 4.37 x 2.68 x 0.1 inches (111 x 68 x 36 mm) |
| Item Weight (excluding battery) | 2 ounces (58g) |
| Compatibility | Windows 7 or above, Mac OS 10.1 or above, Android 5.0 or above, Linux, Chromebooks |
9. Warranty and Support
The AOC MS400 Wireless Mouse is backed by AOC's reliable warranty and responsive support. For detailed warranty information and customer service, please refer to the included Warranty Card or visit the official AOC website.
For further assistance, please contact AOC customer support.







