A. Sound-absorbing panels with self-adhesive design. When you receive the sound-absorbing cotton panels, simply tear off the adhesive backing and stick them on. B. Wide application - Suitable for various occasions for acoustic treatment. It can be used for on-site sound treatment of studio and office walls, as well as in recording studios, home studios, and other places where needed. The sound-insulating panels have diverse functions and can be used in studios, rehearsal rooms, concert venues, podcast recording rooms, churches, home theaters, sound-proof booths, home studios, offices, men's private spaces, kennels, storage closets, etc. Using sound-absorbing panels to eliminate unwanted sounds can make other sounds clearer. C. It can effectively reduce indoor reverberation, standing waves, and noise, and improve the sound clarity of the space. D. Made of polyester fiber material, it is environmentally friendly and harmless. It is safe to breathe and touch, and is suitable for adults, children, and pets. You can use it with confidence. E. Size: 15 cm F. Material: Polyester fiber G. Color: Black H. Package content: 12 sound-absorbing panels I. Only the above-mentioned package content is included, and no other products are included. J. Note: Light and different displays may cause slight color differences between the items in the picture and the actual ones. A measurement error of plus or minus 1 - 3 cm is allowed.