The BRYQ60A2S Intelligent Eye, Comfort Airflow and Floor Combination Silver Sensor Kit has Presence and Floor Infrared Sensors with the Ability to Sense Movement in the Room. When you are in the Room, the System Operates Normally. When you Leave the Room for more than 20 Minutes the System Automatically Changes to an Energy-Saving Operating. Using the Intelligent Eye, Savings of up to 20% in Cooling and up to 30% in Heating can be Achieved. The Floor Sensor Detects the Average Floor Temperature and Ensures Even Temperature Distribution Between Ceiling and Floor