Photo 1 of VIVOSUN Register Booster Fan, Fits 4" x 12" Register Holes, with 10 Speeds, Smart Thermostat Control, App Control and Adjustable Wind Direction, HVAC Vent Fan Booster, White

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Photo 1 of VIVOSUN Register Booster Fan, Fits 4" x 12" Register Holes, with 10 Speeds, Smart Thermostat Control, App Control and Adjustable Wind Direction, HVAC Vent Fan Booster, WhitePhoto 2 of VIVOSUN Register Booster Fan, Fits 4" x 12" Register Holes, with 10 Speeds, Smart Thermostat Control, App Control and Adjustable Wind Direction, HVAC Vent Fan Booster, White