This versatile Presentation Stand is an economical choice for a variety of AV/presentation functions such as a lecture stand or laptop computer stand. With two independent tops that tilt and adjust in height, unit can be used for either sitting or standing. Unit rolls on four 2” heavy-duty casters (two locking) for easy movement. Upper level surface adjusts from 28”-42”. Lower level surface adjusts from 24”-38”. Locking tilt adjustments on both.