Air outlet: 30W supply airflow 0.5m/min, 40W supply airflow 0.8m/min, 60W supply airflow 1m/min, 80W supply airflow 1, 1m/min. Copper coils: High quality motors provide smooth and steady wind output. No noise, delay heat dissipation, and can work continuously for a long time. Fixed seismic design: thickened and widened fixed bracket, strong and solid, can absorb the vibration generated by the motor during operation , reduce noise and ensure that the fan continues to work stably. Housing: The fan is handcrafted from pure iron, and the motor performance is also very stable. It can adapt to various harsh environments and will not perform poorly after longterm use. Uses: 30/40 watts are suitable for home use and 60/80 watts are suitable for barbecue. easy to carry.