Very 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 offices Installation - 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 very suitable for small and medium-sized rooms, theater rooms, recording studios, churches or offices. Make higher-quality audio and video recordings - instantly improve 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. Our sound proof foam panels come compressed in a vacuum package and quickly recover to normal size, either by placing in a well-ventilated place for about 24-48 hours or soaking the soundproof foam in water for one minute then wringing the water out and using a hair dryer or letting it air/sun dry. colour: Blue Material :Polyurethane size: 30 x 30 x 2.5cm Package Contents: 24x blue sound-absorbing cotton