30 * 30cm/ 12 * 12in acoustic foams, 12 pack. Ideal for controlling the reflections of sound within a small room. Let you have more enjoyable sound by effectively controlling unwanted reverb and echo. Suitable for recording studios, control rooms, offices, vocal booth, etc. ammoon 12 Pack Studio Acoustic Foams Panels Sound Insulation FoamBrand : OtherType : AccessoriesAre batteries needed to power the product or is this product a battery : NoIs this a Dangerous Good or a Hazardous Material, Substance or Waste that is regulated for transportation, storage, and/or disposal? : No