The Mars Hydro 4” Inline Fan & Carbon Filter Combo with Thermostat Controller Kit is a powerful and energy-efficient air circulation system designed for indoor grow tents. This round fan operates on a 240V power source with a 50Hz frequency, providing a ventilation system that efficiently moves air through the space. The kit includes a thermostat controller for precise temperature control, making it ideal for maintaining optimal growing conditions. With a sleek black design and ABS plastic construction, this fan is a reliable choice for enhancing ventilation in your indoor garden or patio.