They are portable,, free-standing, and height-adjustable displays featuring a durable, often matte white, screen that pulls up from a casing onto a collapsible three-legged stand. Ideal for both indoor and outdoor settings, they provide a stable, versatile solution with black masking for enhanced contrast, making them perfect for schools, offices, and mobile presentations. [1, 2, 3, 4, 5, 6]