Transfer peanuts into the air fryer, turn on and timer to 16 minutes or as per manufacturer's operation manual.
Once timer is complete transfer peanuts into a baking tray and allow it to cool down.
Notes
The amount of time to be set on the timer will based on the air fryer model you or the quantity of peanuts been roasted. 15 to 16 minutes works just fine for me for 500 grams or 2 cups of peanuts.You will also notice while the peanut is allowed to cool down the roasting process continues until it cools down completely. You need to make sure you understand how the model of your air fryer works to avoid burning the peanuts.