Convient to fix,portable to carry,different specification available,easy to change pictures.made of high quality aluminum alloy.The pictures,stored in the base,can be changed easily.When you use it,what you need to do is to pull the picture out,set up the rack.The whole process takes you no more than three minutes.It is applicable to the tour exhibition and commercial promotion etc.and the beautiful and natural features can promise you with a successful and prosperous business activity!