1、Multi-function. For professional acoustic control, sound dampening, acoustic treatment, noise reduction. 2、Great for spot treating sound on walls in your studio or office. 3、Made from premium material, eco-friendly, durable and flame retardant 4、Pyramid-shaped foam provides moderate sound control on walls or ceilings. 5、Hanging our panels is as easy as hanging a picture on the wall. You can give them beautiful shape with a cutter for your style. Features: Multi-function. For professional acoustic control, sound dampening, acoustic treatment, noise reduction. Great for spot treating sound on walls in your studio or office. Made from premium material, eco-friendly, durable and flame retardant Pyramid-shaped foam provides moderate sound control on walls or ceilings. Hanging our panels is as easy as hanging a picture on the wall. You can give them beautiful shape with a cutter for your style. Specification: Condition: 100%Brand New Material: Sponge Size: Approx.50*50*3cm / 19.69* 19.69* 1.18in Color: Black /Yellow / Red(Optional) Package List: 6* Acoustic Panels Notice: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures.