suitable for on - site sound processing on the walls of recording studios or offices-for recording studios, control rooms, office home studios, home entertainment theaters, home officesInstallation - It is recommended to stick the tape to the four corners and the center of the back of the acoustic foam panels, and then to the wall. Or you can purchase spray glue to install the soundproofing foam according to your needs.Reduce unnecessary noise and - these panels help reduce reverberation, fluttering , undesirable sound reflections, unnecessary noise, and are suitable for small and medium-sized rooms, theater rooms, recording studios, churches or offices.Make higher-quality audio and video recordings - instantly your audio quality when recording your voice, music, interviews, podcasts, or and videos.For on-site treatment professional or home recording studios, commercial or home offices, rehearsal spaces or home theaters. Easy to shape and cut, modification will not affect performance.colour:Black+blueMaterial:Polyurethanesize:30 x 30 x 2.5cmPackage Contents:24 x black sound-absorbing cotton24 x blue sound-absorbing cottonOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.