One sure way is by device manager.
Another, depending on the laptops layout may be using a combination of FN (function) key with the corresponding wifi button, or a physical wireless off switch on the laptop.
Dell XPS 13 9370 (2018) review
No need to scan sketches into your computer with Moleskine's new smart pen
WWDC history: Apple's product launches since 2005
Comment importer des contacts d’un iPhone à un autre iPhone ?