1. Help reduce reverberation, floating echo, undesirable sound reflection, unnecessary noise, very suitable for small and medium-sized rooms, theater rooms, recording studios, churches or offices. 2. For professional voice control, sound damping, acoustic processing, noise reduction-reduce waves, reverberation and floating echo in small and medium-sized rooms. 3. After opening the package, put the sound-absorbing foam in a ventilated place for 12-24 hours 4. Low-cost noise reduction solutions: cost-effective noise reduction products can create an excellent listening or recording environment for you, whether at home or in a recording studio, you can get a good recording experience. 5. High-density flame-retardant material: The sound-absorbing foam board adopts flame-retardant environmental protection material, which is safe to use. For professional acoustic control, silencing, acoustic treatment, and noise reduction-reduce waves, reverberation and flutter echo in small and medium-sized rooms<br><br>Multifunctional use: It is used for acoustic processing/isolation shield in home theater, studio or game room, or as a desktop privacy panel in office. It is also suitable for recording studios, home theaters and karaoke rooms. Can handle walls, ceilings, etc. Colour: black Material: polyurethane Size: 7.5 x 7.5 x 30cm<br><br>Package Contents: 12 x soundproof cotton<br><br>Only the above package content, other products are not included. Note: Light reflection 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.