[Easy To Install]Self-Adhesive Design, with glue on the back, easy to install on walls, ceilings, and walls. Suitable for various smooth surfaces. You don't need to prepare extra adhesives or tools to fix it on.[Both Aesthetics and Functionality]The panel has been specifically developed for those situations where acoustic absorption and greater visual sophistication are required, such as office, meeting room, home office, dining room, and recording studios, Podcasting Booths, Offices, and more. By deadening unwanted sounds like echoes and noise, you can get much clearer sounds.Tiles are an easy, elegant acoustic fix for nearly any space. The tiles are great for reducing background noise, echoes, reverberation time(RT), and decrease standing waves, improves speech intelligibility, and help increase sound clarity in a room or space.[Specification]Dimensions - 12 x 12 x 0.4 inches (30 x 30 x 0.9 cm), pack of 12, covering 12 square feet; Weight - 3.3 pounds of 12 pieces. Material:Polyurethane Size:30 x 30 x 1cm Package Contents:12 x Acoustic Foam Panels.