Efficient Ventilation: The AeroZesh T4 has powerful performance with airflow at 210 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 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 with the App system for intelligent remote control of remote automation via the App Temperature Control: Optimal device for temperature control with powerful airflow at a quiet 39dB operation to help balance humidity and temperature; With 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 with a long power cord for easy installation, it can be hung anywhere in your tent easily