Reduce noise: The 2-inch foam-designed acoustic panel reduces the wave amplitude by increasing air resistance and absorbing sound. Can effectively control the intermediate frequency and high frequency. Quickly unfold: 12 packs/sets. The soundproof foam is compressed by vacuum packaging and placed in a well-ventilated place. It can quickly return to normal size in about 24-72 hours. Flame Retardant & Environmentally Friendly-The sound insulation foam is flame retardant, preventing fire from spreading and reducing strength. The production material does not contain formaldehyde. It is also and the design is . And cancels echoes. Easy to install: The sound insulation foam panel is light in weight and can be installed on a variety of different surfaces. No special tools are required for installation. Note: Double tape/tape or glue is not included in the package, it needs to be purchased separately. Widely used: It is very suitable for live therapeutic sound on the walls of studios or offices, recording studios, control rooms, office home studios, home entertainment theaters, conference rooms, rooms, etc. Colour:White Material:Polyurethane foam Size: 30 x 30 x 5cm Package Contents: 12 x Sound-absorbing foam Only 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.