Dell KM7321W User Manual page 19

NOTE: If Dell Mouse is not listed, ensure that the pairing mode is enabled on
the wireless mouse.
4 Confirm the pairing process on both wireless mouse and your computer.
The connection-mode light ( ) turns solid white for a few seconds to confirm the
pairing, and then the light turns off. After your wireless mouse and computer pairing
is completed, the wireless mouse connects to the computer automatically when the
Bluetooth is enabled and both devices are within the Bluetooth range.
Pairing your wireless mouse │ 19