Describe: 30cm x 30cm x 2.5cm, 12 pieces. [Sound reduction and noise reduction] The sound absorption effect is remarkable, which can eliminate indoor echo, improve sound quality and stereo imaging, and help suppress plane reflections. For example, you will not affect your neighbors while playing games or watching movies. [Wide use] Our acoustic foam panels are suitable for sound processing in various occasions, such as recording studios, home theaters, game halls, movie theaters, conference rooms, etc., or even your own room. As long as you need, it can help you effectively deal with noise. It is also easy to cut and soft, but not fragile, very durable, and can also be used as a wall decoration. [Easy to install and clean] Our acoustic foam panels are vacuum packed, ventilated or soaked in water and dried to expand into shape. Installation tools are also very simple, such as nails and glue. Buyers who have used it are recommended to use 3m super glue. Or self-adhesive spray glue, As for cleaning, you only need to vacuum and dust off occasionally. [Safety and environmental protection] Our sound-absorbing panels are made of high-quality environmentally friendly polyurethane foam, non-toxic, non-irritating odor, fireproof and non-flammable, and will not cause any harm to the human body. The elderly and children can also use it with confidence.