Silent, battery-powered desk fan for special-effects and event applications. The unit has a 23 cm drum, adjustable speed from 850 to 1350 RPM, and a maximum airflow of 528 m³/h. Its drum rotates to allow flexible airflow direction. The built-in 3.7 V, 4000 mAh lithium-ion battery provides up to 11.5 hours of operation, with approximately four hours of recharging time. The black plastic housing includes a recessed carrying handle and four rubber feet.