Sound absorption index???pass the GBJ75-1984, GB/T19889.3-2005test???Average acoustic quantity 37dB(A)~43 dB(A)???

Noise absorptivity :pass  GB/T20407-2006 test. Average0.90~0.98

Weather-shield durability ???qualified according toJG149-2003???JGJ 144-2004 standard inspection

Fire resistance???achieve A level according to GB/T8626-2006standard

Impact resistance???according to the A of GB/T14153

Antitypy???pass the GB/T15227

Transmission of light???pass the GB/T2410

Corrosion resistance???pass the GB/T1771-2007

Features???Waterproof and dustproof, beautiful economy, advancedstructure, update convenient