1. Pyramid 3D acoustic design: Pyramid foam can provide moderate sound control on the wall or ceiling. Through professional acoustic control, sound suppression, acoustic processing, noise reduction, acoustic foam can reduce fluctuations, reverberation and flutter echo in small and medium-sized rooms. 2. Safety and environmental protection: The sound-absorbing panel is made of environmentally friendly polyurethane foam, which not only has effective sound absorption characteristics, but also does not cause any harm to the human body. 3. Widely used: very suitable for on-site sound processing on the walls of studios or offices-suitable for recording studios, control rooms, office home studios, home entertainment theaters, home offices. Easy to shape and cut to size, changes will not affect performance. 4. Easy to clean: high-quality studio foam can permanently maintain its sound insulation function. In terms of cleaning, you only need to vacuum and dust it occasionally. 5. The sound insulation board is most suitable for sound processing. It is made of high-density flame-retardant material, which can more effectively isolate the sound and create a good recording environment. Product features: sound absorption and noise reduction, sound insulation, echo elimination, improvement of timbre, reduction of reverberation, beautiful decoration, environmental protection and flame retardant Colour:black Material:foam Size: 30 x 30 x 2.5cm Package Contents: 24 x sound insulation cotton 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.