Usage Tips:Acoustic panel sound absorbing technology effectively reduces noise and echo in any room. Made with polyester fiber, our acoustic wall panels are odorless, non-toxic and free of formaldehyde, it's safe for indoor use. You can stick the soundproof panels on the wall, ceiling and floor STYLISH DECORATION - The soundproof wall panels with color combinations enhance the decor of any room, making your space look fantastic and interesting, while still providing soundproofing benefits WIDE APPLICATIONS - This polyester fiber acoustic panel can also be used as a felt wall panel, notice board, cat scratching board and more! The acoustic wall panels are suitable for a variety of settings, including home, bedroom, office, recording studio, music classroom, and more, our soundproof wall panels are versatile and effective. Use it behind your TV, door back, room wall, ceiling! Decorate your own style space EASY TO USE - Our felt wall tiles are precision-edged for seamless installation, and the sound absorbing panels are easy to install with self-adhesive backing, just tear the cover and stick the panel Note: With adhesive backing, the color and style of the adhesive backing are random, and specified color and style are not accepted Colour:Black&Gray&Silver Gray Material:Polyurethane Size:Single side length 17.5cm Package Contents: 12 x acoustic panel Only the above package content, other products are not included. Note: Light reflection 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.