Practical and beautiful. The density is as high as 230 kg/cubic meter. The higher the density, the better the sound insulation and noise reduction effect. The thickness is only 0.9 cm, taking up no space at all. The unique hexagonal design allows each piece to fit together perfectly. You can also cut it yourself or collage it with other shapes.Easy to assemble. The entire back is self-adhesive, no other tools are needed, just peel off the protective film and stick it on. Due to the ultra-thin thickness of the adhesive layer, the sound-absorbing panels, adhesive layer and wall can be firmly connected to each other, so you don't have to worry about panel edges bulging or panels falling off the wall. It can be safely installed on any desired surface. 100% RELIABLE HOUSEHOLD PRODUCT: Made of non-toxic and harmless recyclable polyester material, safe to breathe and touch for children, pets and adults. Multifunctional panel: In addition to noise reduction, it also has a sound insulation effect and improves sound quality. Coolbird soundproof walls adopt lamination technology and have good anti-seismic, anti-collision, anti-slip and anti-scratch properties. It can also be used as a background wall for photos or notes to prevent pins from damaging the wall. Multiple scene applications: recording studios, home theaters, conference rooms, offices, music rooms, classrooms, hotels, band rooms and other rooms that require acoustic treatment. Coolbird sound-absorbing panels can provide you with excellent sound-absorbing effects. Note:1. Please allow some defects due to manual measurement.2. Due to different monitors, colors may vary, please understand.If your payment information is incorrect, your order is incorrect.