AC Vent Booster Fan 4″ X 10″ Register, Improves Airflow for Rooms | Quiet 10-Spe
【10-Speed Airflow Boost for Hot Rooms】Choose from 10 adjustable speed levels to improve airflow exactly where you need it. 【DIY Aromatherapy for Bedroom Comfort】Built-in aroma pad lets you add essential oils (not included) for a relaxing airflow experience.