Presenting the PRC100 Presentation Stand. This versatile stand is an economical choice for a variety of AV/presentation functions, such as a lecture stand or laptop computer stand. With two independent tabel tops that tilt and adjust in angle and height to meet your presentation needs, this unit can be used for either sitting or standing. The PRC100 rolls on four, two-inch heavy duty casters (two of which lock) for easy movement and positioning. The upper table top surface adjusts from 28 to 42 inches, while the lower table top surface adjusts from 24 to 38 inches. The tilting mechanism on both tables locks into place, for optimal reading and presentation.