Dell WM324 User Manual page 6

Unifying Pairing Features
The USB Unifying receiver is a wireless receiver that can stay plugged into your
computer's USB port, allowing you to easily connect your wireless mouse and keyboard
to your computer, and up to four additional unifying-compatible wireless devices at the
same time.
To begin using your receiver, ensure your computer has the software installed. Unifying
software may be pre-installed on your computer. The software can also be downloaded
from dell.com/support/Unifying.
5 Setup