AOC MS400

AOC MS400 Wireless Mouse User Manual

Model: MS400

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.

AOC MS400 Wireless Mouse with labels pointing to features

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:

  1. 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.

  2. Retrieve USB Receiver:

    The Nano USB receiver is stored inside the mouse, next to the battery compartment. Gently pull it out.

  3. 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.

    AOC MS400 Wireless Mouse connected to a laptop via USB receiver

    Image 4.1: The AOC MS400 Wireless Mouse in use, showing the USB receiver plugged into a laptop.

  4. 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.
Three screens showing different DPI settings (800, 1000, 1600) with the AOC MS400 mouse

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

ProblemSolution
Mouse not responding
  • Ensure the mouse is powered on.
  • Check if the battery is correctly installed and has sufficient charge. Replace if necessary.
  • Verify the USB receiver is securely plugged into a working USB port. Try a different USB port.
  • Move the mouse closer to the USB receiver to ensure it's within the 2.4G wireless range (up to 33ft/10m).
Erratic cursor movement
  • Clean the optical sensor on the underside of the mouse.
  • Ensure you are using the mouse on a suitable surface. Avoid highly reflective or transparent surfaces.
  • Adjust the DPI setting using the DPI button.
Connection issues
  • Unplug and re-plug the USB receiver.
  • Restart your computer.
  • Ensure there are no other 2.4G wireless devices causing interference nearby.

8. Specifications

FeatureDetail
Model NumberMS400
Connectivity2.4G Wireless (USB Type-A Nano Receiver)
Movement Detection TechnologyOptical
Adjustable DPI800 / 1000 (default) / 1600
Power Source1 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)
CompatibilityWindows 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.

© 2026 AOC. All rights reserved.

Ask a question about this manual

Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.

After a successful submission, we securely hash the supplied account or form email before sending it to Microsoft Advertising for conversion attribution. Privacy details.