1. Introducció
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. Producte acabatview
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.

Un acabatview 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.
- Il·luminació intel·ligent: 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.
- Disseny durador: Constructed with recycled plastic and packaged with FSC-certified materials.

Un detallat 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.
- Desplaçament MagSpeed: Scrolls 1,000 lines per second with silent operation.
- Clics silenciosos: Reduces click noise by approximately 90% compared to previous models.
- FLOW Functionality: Seamlessly control multiple computers and transfer text, images, and files entre ells.
- Disseny ergonòmic: 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. Configuració
3.1. Desembalatge i càrrega inicial
- Carefully remove the keyboard and mouse from their packaging.
- 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. Connexió dels dispositius
Your devices can be connected via Logi Bolt USB receiver or Bluetooth.
3.2.1. Logi Bolt USB Receiver
- Plug the Logi Bolt USB receiver into an available USB-A port on your computer.
- Engegueu el teclat i el ratolí. S'haurien de connectar automàticament al receptor.
- 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. Connexió Bluetooth
- Enceneu el teclat i el ratolí.
- 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.
- 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. Instruccions de funcionament
4.1. MX Mechanical Keyboard Operation
4.1.1. Experiència de mecanografia
El 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. Manteniment
5.1. Neteja
- Teclat: Utilitzeu un drap suau i sense pelusa lleugerament 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.
- Ratolí: Netegeu la superfície amb un suau, damp cloth. Use a cotton swab to clean around the scroll wheels and sensor area.
5.2. Cura de la bateria
- Charge your devices regularly using the provided USB-C cable.
- Avoid exposing the devices to extreme temperatures.
- Per a una durada òptima de la bateria, eviteu descarregar-la completament amb freqüència.
6. Solució De Problemes
6.1. Problemes de connexió
- El dispositiu no es connecta: 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.
- Connexió intermitent: 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)
- La retroiluminació no funciona: Ensure the keyboard is charged. Check Logi Options+ settings to ensure backlighting is enabled and not set to minimum brightness.
- Backlight not adjusting: Assegureu-vos que el sensor de llum ambiental no estigui obstruït.
7. Especificacions
7.1. MX Mechanical Keyboard (KX850FT)
| Característica | Detall |
|---|---|
| Número de model | KX850FT |
| Tipus de clau | Pro baixfile Mechanical (Tactile Brown Switch) |
| Viatge clau | 3.2 mm |
| Força d'accionament | 55 g |
| Key Pitch | 19 mm |
| Connectivitat | Receptor USB Logi Bolt, Bluetooth de baix consum |
| Durada de la bateria | Up to 15 days (backlight on), Up to 10 months (backlight off) |
| Port de càrrega | USB-C |
7.2. MX Master 3s Mouse (MX2300PG)
| Característica | Detall |
|---|---|
| Número de model | MX2300PG |
| La tecnologia de sensors | Darkfield High Precision |
| Rang de DPI | 200-8000 DPI (adjustable in 50 DPI increments) |
| Roda de desplaçament | MagSpeed Electromagnetic Scrolling |
| Botons | 7 buttons (Left/Right click, Back/Forward, App-Switch, Wheel mode-shift, Middle click) |
| Connectivitat | Receptor USB Logi Bolt, Bluetooth de baix consum |
| Durada de la bateria | Up to 70 days on a single full charge; 1 minute quick charge for 3 hours of use |
| Port de càrrega | USB-C |
7.3. Compatibilitat del sistema
- 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. Garantia i Suport
8.1. Garantia del fabricant
Your Logitech MX Mechanical Keyboard (KX850FT) and MX Master 3s Mouse (MX2300PG) are covered by a Garantia del fabricant de 2 anys des de la data de compra. Aquesta garantia cobreix els defectes de materials i de mà d'obra en ús normal.
Conserveu el vostre comprovant de compra per a reclamacions de garantia.
8.2. Atenció al client
For further assistance, technical support, or warranty inquiries, please visit the official Logitech support weblloc:
You can find FAQs, troubleshooting guides, and contact information for customer service on the weblloc.





