[High Material and Safety] Soundproof wall panels are made of Polyurethane, flame retardant grade: B1, safe to breathe and Press, and safe for people and pets.The acoustic foam panels are dense and thick open cell foam, great at cancelling room reverb/ echo/ standing wave/ noise, and improving the sound clarity in a space; High NRC (noise reduction coefficient): 0.75.[Noise Absorbing] Our acoustic wall panel not only provide sound insulation and noise reduction for walls, they also serve as a decorative wall, and will not fade.[Easy to Install] Beveled edge design of the acoustic panel can adapt to a variety of splicing decoration, which is conducive to restoring the true tone and preventing crosstalk impurities. With self-adhesive backing, easy to install, can be easily removed and adjusted at will the desired location[Widely Usage] The decorative acoustic panels are great for recording studios, podcast, streamers, musicians, control rooms, also perfect for home theaters, professional movie theaters, concert halls and more. By absorb unnecessary echoes and minimize interference, and can make other sounds much clearer.[Good sound absorption characteristics] If you are mixing in a studio, you must reduce the ambient sound. Unnecessary noise during recording will destroy it. Using our studio foam panels on the ceiling, behind the TV or under your rug which leaves countless beautiful memories in a comfortable environment.Colour:blackMaterial:PolyurethaneSize:30 x 30 x 5cmPackage Contents:6 x Sound-absorbing cotton(Adhesive: random color, don't accept the specified color)Only the above package content, other products are not included.Note: Light shooting 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.