EASY TO INSTALL - Our acoustic wall panels come with self-adhesive, double-sided tape on the back that can be peeled off and used immediately. Save your time and money. Be sure to press hard after sticking to the wall to avoid falling.Fast Expansion - Our insulating foam recovers faster than other different sound panels.Affordable Soundproofing Practice - Our acoustic foam panels absorb sound waves reflected from hard surfaces. The result is a smooth, quiet environment. Soundproofing foam, although not 100% soundproof, allows you to enjoy the activities of both residential and commercial premises.ECO-FRIENDLY SAFE - Made of Polyurethane, it's perfect for any location in your home or studio, and it's safe for both adults and children. There may be a slight temporary odor upon opening, which is normal and harmless, and will go quickly.size:about 30x30x5cmMaterial:Polyurethanecolour:Black + BluePackage Contents:12 x Acoustic Foam PanelsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.