The use of white plastic screens for business education is commonly used for conferences and teaching. The base fabrics are made of woven canvas. Our company uses the same high-grade white plastic materials, although the traditional white plastics are also made with excellent materials to produce first-class high-quality products. It is best to use the above medium and high-end HD products for business use. The new synchronous motor of motor JK is faster and retractable than the general synchronous motor, which is relatively effective in reducing motor noise. The stroke controller controls the position of the projection screen and accurately positions it.