Usage Tips:-adhesive-The soundproof foam panel has a -adhesive label covering the entire back, which can be easily attached to any surface. No special or materials are required for installation. Easy to shape and cut, modification will not affect performanceReduce noise-The foam-designed acoustic panel reduces the wave amplitude by increasing resistance and absorbing sound. It can effectively control the intermediate frequency and high frequency.Quick deployment-The soundproof foam is compressed by vacuum packaging and placed in a -ventilated place. It can quickly return to normal size in about 24-72 hours. Retardant & Environmentally -The sound insulation foam is retardant, preventing fire from spreading and reducing strength. The production material does not contain formaldehyde and is very non-toxic. It is also durable and designed to be durableWidely 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, baby rooms, etc.The color of the adhesive is random and cannot be and specifiedsize:30x30x5cmMaterial:Polyurethanecolour:Dark grayPackage Contents:12 x Acoustic Foam PanelsOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.