4" Inline Fan - 100 CFM, Metal Duct Booster Fan, ETL Listed, Pre-Wired 6 FT Grounded Cord - Great for Grow Tent Exhaust and Intake, Register Booster for 4 Inch Ducts 4IN INLINE FAN FOR GROW TENT VENTILATION: Use It As Intake Fan to Bring Fresh Air to Grow Tents or Rooms. Can Be Used as Exhaust Fan in Smaller Set Ups with LEDs or CFL Lights. HOUSEHOLD VENTILATION: This Versatile Inline Duct Fan Is Designed To Exhaust and Intake Air Through 4" Ducts, Serve as Register Booster Fan to Improve Airflow from HVAC Units to Remote Register Vents, Exhaust Odors in Bathrooms, Workshops, Ventilate Stale Air in Basements and Attics, Etc. IN LINE FAN SPECS: Airflow 100 CFM, Power 18W, Voltage 120V/110V, Speed 2600 RPM. ETL Listed, Compatible with Certain Speed Controllers. For Indoor Use Only in Environment With Max Temperatures Not Exceeding 140F. PACKAGE CONTENTS: 4 Inch Duct Fan, Instructions Manual. 4 Inch Diameter x 7.25 Inch Length, 6 Foot Grounded Power Cord. WARRANTY: This Inline Duct Fan is Covered by 1 Year Warranty. Contact Us through Amazon For Service.