Dell XPS 18 (1810, Early 2013) - Manual (Page 11)

• Wireless keyboard and mouse (optional) - Inputs text and
controls the cursor.
NOTE: The keyboard and mouse are already paired to your computer if
you ordered the keyboard and mouse along with your computer. If you
purchased the keyboard and mouse separately, or if you need to pair
them again, see
Pairing the Wireless Keyboard and Mouse .
Accessories │ 11