Feature: 1. Acoustic Panel: Can suppress high, medium and low frequency sounds and reduce unnecessary echoes and vibration. 2. Trapezoidal Foam: Trapezoidal design ensures perfect matching without seam, which also enhances sound insulation. 3. Flexible Usage: Allows for broad application in various places, including studio, concert hall, home, office, library, etc. 4. Good Material: Adopting premium polyester fibre material, the soundproof foam enables safe and long term using. 5. Easy to Install: There is adhesive on the back, you just need to tear off the tape and directly install it, very convenient. Specification: Item Type: Acoustic Panel Material: Polyester Fibre Colour: Black Package List: 12 x Acoustic Panel How to use: Tear off the adhesive on the back and use it directly.