Photo 1 of Azocek Register Booster Fan for 4” x 10” Vents – Quiet Smart Vent Fan with Dual Temp Sensors, 11-Speed PWM Motor, Remote & Auto Mode – Boosts Heating & Cooling Airflow – White

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Photo 1 of Azocek Register Booster Fan for 4” x 10” Vents – Quiet Smart Vent Fan with Dual Temp Sensors, 11-Speed PWM Motor, Remote & Auto Mode – Boosts Heating & Cooling Airflow – WhitePhoto 2 of Azocek Register Booster Fan for 4” x 10” Vents – Quiet Smart Vent Fan with Dual Temp Sensors, 11-Speed PWM Motor, Remote & Auto Mode – Boosts Heating & Cooling Airflow – White