Photo 1 of Hon&Guan 4 Inch Inline Duct Fan with Upgrade Controller - 130 CFM Airflow with 6W Ultra-Low Power and Low Noise

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Photo 1 of Hon&Guan 4 Inch Inline Duct Fan with Upgrade Controller - 130 CFM Airflow with 6W Ultra-Low Power and Low NoisePhoto 2 of Hon&Guan 4 Inch Inline Duct Fan with Upgrade Controller - 130 CFM Airflow with 6W Ultra-Low Power and Low Noise