A. [Environmental Protection and Safety] These sound-absorbing cotton for recording studios are made of environmental-friendly materials. They are durable and effective, posing no significant health risks and ensuring relatively safe use. B. [Sound Absorption Function] The sound-absorbing panels can suppress and disperse mid - and low-frequency sound waves indoors, reducing interference and enhancing sound effects to a certain extent. C. There are a total of 50 pieces of this soundproof and sound-absorbing panel. Each panel has an area of 0.6 square feet and a thickness of 1 inch. The coverage area of 12 pieces is approximately 0.6 square meters. D. [Easy to Install] These sound-absorbing panels for recording studios can be used as soundproof covers for walls, ceilings, and doors, and can be fixed with nails, screws, or glue. E. [Wide Application] The soundproof and sound-absorbing panels are suitable for recording studios, vocal booths, control rooms, as well as theaters, professional cinemas, concert halls and other places. F. Color: Black G. Material: Polyurethane H. Dimensions: 30 x 30 x 2.5 cm I. Package Contents: 50 sound-absorbing panels J. Only the above package contents are included, and no other products are included. K. Notes: The color of the items in the picture may vary slightly from the actual product due to light and different monitors. A measurement error of plus or minus 1 - 3 cm is allowed.