Dell XPS 18 (1820, Early 2014) - Manual (Page 10)

10 │ Accessories
∞ Wireless keyboard and mouse (sold separately) - Inputs text and
controls the cursor.
NOTE: If you order the keyboard and mouse along with your
computer, they are already paired when you receive them. If you
purchase the keyboard and mouse separately, or if you need to
pair them again, see
“Pairing the wireless keyboard and mouse” .