Details*Features* - *Ventilation Booster Fan* - This fan system enhances airflow through your wall and floor HVAC ducts to improve home comfort. It eliminates uneven room temperatures with high-precision temperature sensor,automatically turning on/off to maintain your desired climate setting.*Smart Temperature & Dual Diffuser Slots* - Featuring automatic temperature detection and dual built-in aroma diffuser slots,this smart register fan lets you add essential oils or perfume(not included) to th