Practical arc sound-absorbing acoustic panels, simple and easy to operate. Professional design, can add quiet atmosphere to your room. Sound absorption and noise reduction, you can use it with the peace of mind. Features - ColorBlack - Material: Foams - Size: About 25.00X12.00X12.00cm/9.82X4.72X4.72in - Great sound insulation accessory to reduce noise and echo in studios and entertainment theaters. - They utilize the insulation and anti-shock properties of the sound absorbing material, and it can be used in a wide range of applications such as digital equipment. - These panels are excellent for recording studios, home theaters, vocal booths, control rooms, and offices. - You can install and remove them from your wall easily, very simple for you to use. - Suitable for home, school, gym, church, restaurant, office, very practical and convenient. Package list: 4 x Acoustic Sponges