This 4" inline duct fan is designed to improve airflow for grow tents, indoor gardening spaces, and other ventilation needs. It features an energy-efficient EC pure copper motor, a 10-speed PWM controller, app control, and temperature and humidity monitoring. With airflow up to 205 CFM and low-noise operation, it helps maintain a more stable growing environment. Its lightweight housing and wall-mountable design support flexible installation. The unit is intended for small indoor exhaust applications and includes the inline duct fan only.