Photo 1 of Hisummer Window Register Booster Fan Fit 4" x 10" Air Vent Duct Openings, Quiet AC Vent Fan Booster with 10 Speeds Remote Control & Thermostat Household Ventilation Fans for Room Cooling (Upgrade)

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Photo 1 of Hisummer Window Register Booster Fan Fit 4" x 10" Air Vent Duct Openings, Quiet AC Vent Fan Booster with 10 Speeds Remote Control & Thermostat Household Ventilation Fans for Room Cooling (Upgrade)Photo 2 of Hisummer Window Register Booster Fan Fit 4" x 10" Air Vent Duct Openings, Quiet AC Vent Fan Booster with 10 Speeds Remote Control & Thermostat Household Ventilation Fans for Room Cooling (Upgrade)