Easy to Install sound absorbing panels can be used as acoustic cover for walls, ceilings and doors, just easy to use as attach it with staples, nails, screws, tacks, Double-sided tape or glue. PS: Adhesive not included. Fashionable AppearanceThis Acoustic Foam Panels is designed as unique triangle, which can not only absorb unnecessary sound, but also play a role in decorating the wall surface.Easy to shape and cut to size, altering wont affect performance. High quality materialsound insulation board is made of High density polyurethane material flame retardant and environmentally friendly materials, effective in sound insulation and made of fireproof, ensuring practical safety.is a safe and reliable product. Do not worry about product deformation caused by long-term compression. They can be soaked in water for some time and then air dried to restore the original shape.you can safely use them. Widely UsageThis sound dampening foam panels can be Use to spot treat a professional or home recording studio, commercial or home office, rehearsal space, or home theatre, and which are great for recording studios, vocal booths, control rooms, also ideal for home theaters, professional movie theaters, concert halls and more. [Covering area] 12 pieces covering 12 square feet - each tile is a 1 square foot 1 inch thick acoustic wedge. With compression. Note: When using the sticker, please ensure that the wall is flat and free of powder and other foreign matters, which will affect the pasting effect. If your walls are rough, we recommend that you use acoustic foam spray glue.