Specification 1.Soft sponge, interior decoration of the occasion. 2.Widely used in recording studios, recording studios, audio-visual rooms, audio-visual rooms, piano rooms, drum rooms, anchor rooms, home theaters, KTV, soundproof rooms, conference halls, studios, broadcasting rooms, theaters, etc. 3.Product application principle: Use the open-pored structure to increase its sound absorption capacity and optimize its internal porosity, reduce the interference and reverberation of indoor reflected sound, improve the purity of the sound, adjust the indoor sound field and reverberation, and make the sound pleasant to the ears. Material: sponge Size: 300x300x25mm Quantity optional: 24 pieces, 12 pieces Color: Black/Blue/Red