ST-X1000 is a Acrylic designed scent air machine for 2000-2500m3 large space. The capacity is 500ML which can scent one month under normal setting. You can freely set the weekly working, daily working time and intensity. And the key design ensure that others can not change the settings at will. This model can be stand alone, wall-mounted or work with HVAC, which can meet the needs of different using environment.