The timer's increments vary depending on the cook function:
Air Fry: 1-minute increments up to 1 hour.
Roast: 1-minute increments for the first hour, followed by 5-minute increments for the next 3 hours.
Dehydrate: 15-minute increments up to 12 hours.
Reheat: 1-minute increments up to 1 hour.