User Manual Oster TSSTTVXXLL Extra Large Countertop Oven

In your Countertop Oven there is a built in fan that circulates the hot air in the oven chamber cooking your food faster and more evenly

While a shorter cook time is often desirable, baked goods in particular benefit from Turbo cooking as the circulating air keeps oven temperature consistent throughout.

On average, the Turbo function will shorten the cooking time, but it varies by food. It is suggested to go with a shorter cooking time to start with and then add time if it is needed.