Logitech MX Master 3S Wireless Bluetooth Mouse

1. Introduction

The Logitech MX Master 3S is a high-end wireless Bluetooth mouse designed for cross-screen laptop and desktop use. It features an ergonomic design for comfortable control, with a bowback profile shaped to fit the hand. The well-arranged side buttons and thumb wheel are easy to operate, and the rubber palm pad provides a sweatproof, non-slip, and fully supported grip for extended comfort.

2. Setup

2.1 Detailed Setup

1. Ensure the mouse is turned on. The No. 1 LED indicator light at the bottom of the mouse should flash quickly. If the LED does not flash quickly, press and hold the Easy-Switch button for 3 seconds to put the mouse into discoverable mode.
2. Choose your desired connection method:
   • Using the included LOGI BOLT wireless receiver: Insert the receiver into an available USB port on your computer.
   • Connecting directly via Bluetooth: Open your computer's Bluetooth settings to complete pairing. The mouse LED will flash quickly when in discoverable mode.
3. Install Logitech Options+ software. Download the Logitech Options+ version to unlock the full potential of this mouse, including customization options for buttons, gestures, and DPI settings.

2.2 Pairing with Multiple Computers (Easy-Switch)

The MX Master 3S can be paired with up to three different computers. Use the Easy-Switch button to easily switch between connected devices.

1. Short press the Easy-Switch button (located on the bottom of the mouse) to switch between channels 1, 2, and 3.
2. Select the desired channel and proceed with connecting to your computer as described in section 2.1.

3. Operating Instructions

3.1 Key Features Overview

1. MagSpeed Wheel: Main scroll wheel with adaptive speed.
2. Wheel Mode Toggle Button: Switches between segmented and hyper-fast scrolling.
3. Gesture Buttons: Customizable buttons for various actions.
4. Tap Softly: Refers to the quiet click technology.
5. Thumb Roller: For horizontal scrolling.
6. Battery LED Indicator Light: Shows battery status.
7. USB-C Fast Charging Port: For charging the mouse.
8. Switch Button: Power on/off switch.
9. 8000DPI Sensor: High-precision Darkfield sensor.
10. Resolution Easy-Switch Button & Connect Button: Combines DPI switching and Easy-Switch functionality.
11. Back Button: Navigates back in applications or web pages.
12. Forward Button: Navigates forward in applications or web pages.

3.2 MagSpeed Adaptive Scroll Wheel

The adaptive speed scroll wheel automatically switches between two scrolling modes based on your scrolling speed:

• Segmented (Ratchet) Mode: Ideal for precise navigation of items and lists.
• Hyper-fast (Free-scrolling) Mode: Provides nearly frictionless scrolling, allowing you to quickly browse long documents and web pages.

You can also manually switch scroll wheel modes by pressing the Wheel Mode Toggle Button (2).

3.3 Thumb Wheel

A gentle flick of the thumb wheel (5) enables horizontal scrolling. Install Logitech Options+ software to extend the functionality of the thumb wheel, including:

• Adjusting scrolling speed and direction.
• Enabling application-specific settings, such as zooming in Microsoft Word/PowerPoint, adjusting brush size in Adobe Photoshop, navigating timelines in Adobe Premiere Pro, switching tabs in browsers, adjusting volume, or assigning custom keystrokes.

3.4 Gesture Buttons

Install Logitech Options+ software to enable and customize gestures. To use gesture buttons (3), press and hold the gesture button while simultaneously moving the mouse left, right, up, or down. You can assign up to five different actions to the gesture button for desktop navigation, application management, panning, and more.

3.5 Back/Forward Buttons

The back (11) and forward (12) buttons are conveniently located for easy control, improving navigation efficiency. Press these buttons to navigate between web pages or document pages (depending on the mouse pointer's location). For Mac users, installing Logitech Options+ software is required to enable these buttons and unlock additional functions like undo/redo, operating system navigation, zoom, and volume control.

3.6 Darkfield 8000 DPI Sensor

The MX Master 3S features an 8000 DPI Darkfield sensor. By default, the mouse operates at 1000 DPI. Install Logitech Options+ software to extend the sensor range up to 8000 DPI. Enabling this option allows for faster and more precise operation, letting you adjust pointer speed to match high-resolution displays.

3.7 Application-Specific Settings

With Logitech Options+, you can assign different functions to mouse buttons for different applications. For example, you can configure the thumb wheel to control horizontal scrolling in Microsoft Excel or zooming in Microsoft PowerPoint. After installing Logitech Options+, you can install predefined application-specific settings to optimize mouse button behavior for selected applications.

3.8 Logitech Flow

Logitech Flow allows you to operate with one MX Master 3S across multiple computers. You can move your mouse cursor from one computer to another and even copy and paste content between them. If you have a compatible Logitech keyboard (such as MX Mechanical), the keyboard will follow the mouse, switching control simultaneously. To use this feature, you need to install Logitech Options+ software on all participating computers.

4. Maintenance

4.1 Charging the MX Master 3S

To charge your MX Master 3S, connect one end of the supplied USB-C charging cable to the USB-C port (7) on the mouse, and the other end to a USB power source. Just 3 minutes of charging can provide enough power for a full day of use. A full charge can last up to 70 days, though battery life varies depending on user and operating conditions.

4.2 Checking Battery Status

The three LED indicator lights (6) on the side of the mouse indicate the battery status:

• Green: 100% to 10% charge remaining.
• Red: 10% charge or less remaining.
• Flashing Green: The mouse is currently charging.

Install Logitech Options+ software to receive battery status notifications, including low battery warnings.

4.3 Cleaning the Device

To clean your MX Master 3S, use a solution containing 70% isopropyl alcohol and 30% water, similar to common cleaning solutions. Avoid using other alcohols or bleach, as they can cause damage to the device.

5. Troubleshooting

• Bluetooth Connection Issues: If you encounter problems connecting via Bluetooth, ensure the mouse is in discoverable mode (LED flashing quickly) and your computer's Bluetooth is enabled. Refer to your computer's operating system documentation for specific Bluetooth troubleshooting steps.
• Thumb Wheel Horizontal Scrolling Issues: Some users have reported that installing Logitech Options+ can interfere with horizontal scrolling functionality in web browsers. If you experience this, try uninstalling Logitech Options+ to see if the issue resolves. This may indicate a software conflict rather than a hardware defect.
• Battery Stuck at 55%: If your mouse battery consistently shows 55% charge even after prolonged charging, this might indicate a specific unit issue. If this problem persists, consider contacting support for a potential exchange.

6. Specifications

6.1 General Specifications

6.2 Dimensions and Weight

• Mouse Dimensions (L x W x H): 124.9 mm x 84.3 mm x 51 mm
• Mouse Weight: Approximately 141 g
• Gross Weight (Product + Packaging): 320 g
• Package Dimensions (L x W x H): 18 cm x 15 cm x 6 cm

7. User Tips

• Horizontal Scrolling: If you experience issues with the thumb wheel's horizontal scrolling in web browsers after installing Logitech Options+, try uninstalling the software. This can sometimes resolve software-related conflicts.
• Ergonomic Comfort: For enhanced ergonomic comfort and reduced wrist strain during prolonged use, consider pairing your MX Master 3S with a wrist rest.
• White Model Maintenance: If you own the white model, regular cleaning is recommended to maintain its pristine appearance, as lighter colors may show dirt more easily.

8. Warranty and Support

For comprehensive support, including warranty information, downloads, applications, and spare parts, please visit the official Logitech Support website. You can find detailed guides and documents, including a PDF user manual, to assist you with your product.

A PDF version of the user manual is available for download. For direct access, please refer to the official Logitech support page or the provided link in the product documentation: Logitech MX Master 3S User Manual (PDF)

Logitech provides various support resources, including:

• Business Support Homepage
• Support Homepage
• Downloads & Applications
• Spare Parts
• MyHarmony Support
• Certificates
• Warranty Information
• Privacy + Security
• Contact Us

For the most up-to-date information and assistance, always consult the official Logitech support channels.