Vivosun AeroZesh Inline Duct Fan with E12 Speed Controller, Entirely Programmable PWM-controlled EC Fan for Grow Tent VentilationEfficient Ventilation:  The AeroZesh G4 has powerful performance w/ airflow at 195 CFM to create optimal ventilation for your grow space; A PWM controlled EC fan w/ mixed-flow design that is fully adjustable and responsive to the environment. E12 Speed Controller: Ten fan speeds controlled by PWM can be selected by you; Turn off and then on again, backup memory can remember the speed set before the last shutdown; Three ON/OFF cycle mode can achieve the cycle of wind speed to save power. Entirely Programmable: You can upgrade the E12 fan controller to an E42A multi-device controller for more functionality; The GrowHub controller can be integrated w/ the App system for intelligent remote control of remote automation via the App. Temperature Control: Optimal device for temperature control w/ powerful airflow at a quiet 28dB operation to help balance humidity and temperature; w/ an included environmental probe, the AeroZesh monitors environmental changes and adjusts fan speed accordingly. Optimal for Indoor Growth: Ultra powerful and adjustable, the AeroZesh can be used in various sized rooms and is the center of your ventilation system; Equipped w/ a long power cord for easy installation, it can be hung anywhere in your tent easily. Vivosun AeroZesh G6 6-inch 388 CFM Inline Duct Fan, Entirely Programmable PWM-controlled EC Fan for Grow Tent Ventilation Efficient Ventilation: The AeroZesh G6 has powerful performance with airflow at 388 CFM to create optimal ventilation for your grow space; A PWM controlled EC fan with mixed-flow design that is fully adjustable and responsive to the environment. AeroZesh G8 8-inch 725 CFM Inline Duct Fan w/ E12 Speed Controller, Entirely Programmable PWM-controlled EC Fan for Grow Tent Ventilation Efficient Ventilation: The AeroZesh G8 has powerful performance w/

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