The temperature management system of the Whirlpool WRT779RWYW enabled by 6th Sense technology senses and adapts to deliver great cooling performance and food preservation. Adaptive Defrost in the freezer saves up to 12% more energy by running the defrost cycle only when necessary and monitoring how often the compressor operates and the doors are open. Leave air freshness to your refrigerator, not a box of baking soda. This model's FreshFlow air filter reduces common food odors for you. Just another reason why the Whirlpool WRT779RWYW is a great choice for your home!