A request is received to play an audio file. Method of providing extensional flow and production of dispersions are disclosed. The multiple hazard marker will remain erect when deployed and includes a visible marker for marking a position upon a field where deployed. Furthermore, the thermal cage can include an inlet in fluid communication with the cabinet, wherein the inlet is connectable to the supply channel, and a thermal curtain comprising a plurality of adjustable barriers for directing air flowing through the cabinet to the outlet, wherein the thermal cage is movable. When the signal of the multifunctional pin is less than the predetermined value, the voltage detecting circuit configures the PWM signal generating circuit to turn off the current switch. The processed results of both data are stored into system memory area in the host.