Product property:
1. Increase the noise insulation index by 8-12 decibel (large noise insulation index for low frequency), can replace the second layer window of the double layer noise insulation window
2. The noise insulation index can reach 20 decibel when individual use, can be used as the indoor movable sound barrier
3. Have sunshade function, heat insulation and preservation, not take indoor space

4. Many colors fabrics for chosen
5. Three rolling ways of by hand, electric, remote-control, manipulate conveniently
6. Can choose the washable fabrics
7. Simple installation and convenient maintenance
Technology support: Domestic new products, have got national invention patents, patent application number: 200610141089.9.