Air outlet: 30W provides an airflow of 0.5m/min, 40W offers an airflow of 0.8m/min, 60W generates an airflow of 1m/min, and 80W delivers an airflow of 1.1m/min. Copper coils: High-quality motors ensure a smooth and steady airflow. It operates quietly, facilitates heat dissipation, and can function continuously for extended periods. Fixed seismic design: The thickened and widened fixed bracket is robust and sturdy, effectively absorbing vibrations from the motor during operation, minimizing noise, and ensuring stable fan performance. Housing: The fan is expertly crafted from pure iron, with stable motor performance. It is adaptable to various harsh environments and maintains high performance even after prolonged use. Uses: 30/40 watts are ideal for home use, while 60/80 watts are suitable for barbecuing. Easily portable.