How to Sync a Logitech Mouse to Its Dongle

A Logitech wireless mouse next to its USB receiver dongle

To sync a Logitech mouse to its dongle, insert the receiver into a USB port, turn on the mouse, and press the sync button on both devices until the LED light stops blinking. This process pairs the mouse with the dongle via a 2.4GHz wireless connection.

How the Sync Process Works

The dongle acts as a wireless receiver, translating signals from the mouse into USB inputs your computer can understand. When you press the sync buttons, the mouse and dongle establish a secure connection using Logitech's proprietary wireless protocol.

Main Types of Logitech Dongles

Dongle Type	Compatibility	Connection Method
Unifying Receiver	Most Logitech wireless mice and keyboards	2.4GHz wireless
Lightspeed Receiver	Select high-performance mice	1ms wireless
Bluetooth	Some newer models	Bluetooth

When and Why You Need to Sync

You'll need to sync your mouse to its dongle when setting up a new device, replacing a lost dongle, or if the connection drops. The dongle provides a more stable and lower-latency connection than Bluetooth, which is why most Logitech wireless mice use this method.

Common Misconceptions

Many users confuse the Unifying Receiver with a standard Bluetooth adapter. Unlike Bluetooth, the Unifying Receiver uses a dedicated 2.4GHz wireless connection, offering better performance and fewer interferences., some users think they can pair multiple mice to a single dongle, but while the Unifying Receiver supports multiple devices, each must be synced individually.

Step-by-Step Sync Example

Insert the Unifying Receiver into an available USB port on your computer.
Turn on your Logitech mouse by sliding the power switch.
Locate the sync button on the bottom of the mouse and the top of the dongle.
Press and hold the sync button on the dongle until the LED light starts blinking.
Release the dongle's sync button and immediately press and hold the mouse's sync button until the LED light on the mouse stops blinking.
Once connected, the LED light on both devices will remain solid, indicating a successful sync.

I've personally synced several Logitech mice this way, including the popular MX Master series. The process is straightforward and usually takes less than a minute.