Photo 1 of Hisummer Register Booster Fan for 4" x 10" Floor Register, Quiet 10-Speed Vent Fan Booster with Temp Sensor, 150 CFM Airflow, Improves Heating & Cooling, Remote Control, Only Fits 4x10 Duct Openings

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Photo 1 of Hisummer Register Booster Fan for 4" x 10" Floor Register, Quiet 10-Speed Vent Fan Booster with Temp Sensor, 150 CFM Airflow, Improves Heating & Cooling, Remote Control, Only Fits 4x10 Duct OpeningsPhoto 2 of Hisummer Register Booster Fan for 4" x 10" Floor Register, Quiet 10-Speed Vent Fan Booster with Temp Sensor, 150 CFM Airflow, Improves Heating & Cooling, Remote Control, Only Fits 4x10 Duct OpeningsPhoto 3 of Hisummer Register Booster Fan for 4" x 10" Floor Register, Quiet 10-Speed Vent Fan Booster with Temp Sensor, 150 CFM Airflow, Improves Heating & Cooling, Remote Control, Only Fits 4x10 Duct Openings