Logitech MX Mechanical Keyboard (KX850FT) and MX Master 3s Mouse (MX2300PG) User Manual

1. Introduction

Welcome to the user manual for your Logitech MX Mechanical Wireless Performance Keyboard (KX850FT) and MX Master 3s Advanced Wireless Mouse (MX2300PG). This document provides detailed instructions to help you get the most out of your new devices, from initial setup to advanced features and troubleshooting.

Please read this manual carefully before using the products and keep it for future reference.

2. Product Overview

The Logitech MX Mechanical Keyboard and MX Master 3s Mouse are designed for advanced users seeking precision, performance, and comfort. This combo offers a seamless workflow across multiple devices and operating systems.

An overview of the Logitech MX Mechanical Wireless Keyboard and MX Master 3s Wireless Mouse, presented together as a set.

2.1. MX Mechanical Keyboard (KX850FT)

The MX Mechanical Keyboard features low-profile mechanical switches, providing a quiet yet tactile typing experience. Its slim design and smart illumination adapt to your environment, enhancing productivity and comfort.

• Low-Profile Tactile Switches: Offers a quiet typing experience with precise feedback.
• Smart Illumination: Backlighting adjusts automatically to ambient light and activates upon hand proximity.
• Easy-Switch: Connects to up to three devices and switches between them with a single key press.
• Durable Design: Constructed with recycled plastic and packaged with FSC-certified materials.

A detailed view of the Logitech MX Mechanical Wireless Keyboard, showcasing its layout and keycaps.

2.2. MX Master 3s Mouse (MX2300PG)

The MX Master 3s Mouse is engineered for advanced performance, featuring an 8000 DPI sensor for precise tracking and a MagSpeed electromagnetic scroll wheel for ultra-fast, silent scrolling. Its ergonomic design ensures comfort during extended use.

• 8000 DPI Tracking: High-precision sensor for accurate cursor control on virtually any surface.
• MagSpeed Scrolling: Scrolls 1,000 lines per second with silent operation.
• Silent Clicks: Reduces click noise by approximately 90% compared to previous models.
• FLOW Functionality: Seamlessly control multiple computers and transfer text, images, and files between them.
• Ergonomic Design: Sculpted for the shape of your hand for maximum comfort.

A close-up image of the Logitech MX Master 3s Advanced Wireless Mouse in pale gray, showing its ergonomic shape and scroll wheels.

3. Setup

3.1. Unboxing and Initial Charge

1. Carefully remove the keyboard and mouse from their packaging.
2. Connect both devices to a power source using the provided USB-C to USB-A charging cable. A full charge for the keyboard provides up to 15 days of use with backlighting or up to 10 months with backlighting off. The mouse provides up to 70 days on a full charge, with 1 minute of charging yielding 3 hours of use.

3.2. Connecting Your Devices

Your devices can be connected via Logi Bolt USB receiver or Bluetooth.

3.2.1. Logi Bolt USB Receiver

1. Plug the Logi Bolt USB receiver into an available USB-A port on your computer.
2. Turn on the keyboard and mouse. They should automatically connect to the receiver.
3. If connection is not automatic, press and hold one of the Easy-Switch buttons (1, 2, or 3) on the keyboard/mouse until the LED blinks rapidly, then follow on-screen instructions if prompted.

3.2.2. Bluetooth Connection

1. Turn on the keyboard and mouse.
2. Press and hold one of the Easy-Switch buttons (1, 2, or 3) on the keyboard/mouse until the LED blinks rapidly, indicating pairing mode.
3. On your computer or device, navigate to Bluetooth settings and select the Logitech MX Mechanical or Logitech MX Master 3s from the list of available devices to pair.

3.3. Installing Logi Options+ Software

For full customization and advanced features, download and install the Logi Options+ software from the official Logitech website. This software allows you to customize key functions, mouse buttons, backlighting effects, and enable FLOW functionality.

4. Operating Instructions

4.1. MX Mechanical Keyboard Operation

4.1.1. Typing Experience

The low-profile keys and tactile brown switches provide a comfortable and responsive typing experience with reduced noise. The short 3.2mm key travel minimizes finger strain during prolonged use.

A user's hands are shown typing on the low-profile keys of the Logitech MX Mechanical Keyboard, highlighting its ergonomic design.

4.1.2. Smart Illumination

The keyboard's backlighting automatically adjusts its brightness based on ambient light conditions. It also features a proximity sensor that illuminates the keys when your hands approach and turns off when you move away.

4.1.3. Customizing Backlighting

Using Logi Options+, you can customize the backlighting effects. The software allows you to switch between 6 different backlight modes and personalize them to your preference.

4.1.4. Easy-Switch Functionality

Press the Easy-Switch keys (F1, F2, F3) to instantly switch between up to three paired devices. The corresponding LED indicator will light up to show the active device.

4.2. MX Master 3s Mouse Operation

4.2.1. MagSpeed Electromagnetic Scrolling

The MagSpeed scroll wheel allows for precise line-by-line scrolling or ultra-fast scrolling, capable of navigating 1,000 lines in one second. The mode can be switched by pressing the mode shift button.

4.2.2. High-Precision Tracking

The 8000 DPI Darkfield sensor provides exceptional tracking accuracy on various surfaces, including glass. The DPI can be adjusted in Logi Options+ for fine-tuned control.

4.2.3. Customizing Buttons

Utilize Logi Options+ to customize the four programmable buttons on the mouse to suit your workflow. Assign specific actions or application-specific functions for enhanced productivity.

4.2.4. FLOW Functionality

With Logi Options+, enable FLOW to seamlessly control multiple computers with a single mouse. Move your cursor to the edge of one screen and it will appear on the next, allowing you to transfer text, images, and files between Windows and macOS operating systems.

4.2.5. Easy-Switch Functionality

Press the Easy-Switch button on the underside of the mouse to switch between up to three paired devices. The LED indicator will show the currently active device.

A user's hand comfortably gripping the Logitech MX Master 3s Mouse, demonstrating its ergonomic design and button placement.

5. Maintenance

5.1. Cleaning

• Keyboard: Use a soft, lint-free cloth slightly dampened with water or isopropyl alcohol to clean the keycaps and surface. Avoid spraying liquids directly onto the keyboard. For debris between keys, use compressed air.
• Mouse: Wipe the surface with a soft, damp cloth. Use a cotton swab to clean around the scroll wheels and sensor area.

5.2. Battery Care

• Charge your devices regularly using the provided USB-C cable.
• Avoid exposing the devices to extreme temperatures.
• For optimal battery life, avoid completely draining the battery frequently.

6. Troubleshooting

6.1. Connection Issues

• Device not connecting: Ensure the devices are charged and turned on. For Logi Bolt, ensure the receiver is securely plugged in. For Bluetooth, ensure Bluetooth is enabled on your device and the keyboard/mouse is in pairing mode.
• Intermittent connection: Move the devices closer to the receiver or computer. Avoid sources of interference such as other wireless devices or large metal objects.

6.2. Unresponsive Keys/Mouse

• No response: Check battery levels and recharge if necessary. Try reconnecting the device (see Section 3.2).
• Specific keys/buttons not working: Ensure no debris is lodged under the keycap or button. If using Logi Options+, check if the button has been remapped or disabled.

6.3. Backlighting Issues (Keyboard)

• Backlight not working: Ensure the keyboard is charged. Check Logi Options+ settings to ensure backlighting is enabled and not set to minimum brightness.
• Backlight not adjusting: Ensure the ambient light sensor is not obstructed.

7. Specifications

7.1. MX Mechanical Keyboard (KX850FT)

7.2. MX Master 3s Mouse (MX2300PG)

7.3. System Compatibility

• Logi Bolt: Windows 10, 11 or later; macOS 10.15 or later; Chrome OS
• Bluetooth: Windows 10, 11 or later; macOS 10.15 or later; Chrome OS; Android; iPadOS 14 or later (for mouse)

8. Warranty and Support

8.1. Manufacturer's Warranty

Your Logitech MX Mechanical Keyboard (KX850FT) and MX Master 3s Mouse (MX2300PG) are covered by a 2-year manufacturer's warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.

Please retain your proof of purchase for warranty claims.

8.2. Customer Support

For further assistance, technical support, or warranty inquiries, please visit the official Logitech support website:

Logitech Support Website

You can find FAQs, troubleshooting guides, and contact information for customer service on the website.