Reduce noise: The 2-inch foam-designed acoustic panel reduces wave amplitude by increasing air resistance and absorbing sound. Effectively controls mid to high frequencies. Quickly unfolds: 12 panels per set. Soundproof foam is vacuum compressed and should be placed in a well-ventilated area. Returns to full size within 24–72 hours. Fire retardant and environmentally friendly: Sound insulation foam is fire resistant, helping prevent the spread of flames. Made without formaldehyde. Durable design resists wear and helps cancel echoes. Easy to install: Lightweight sound insulation foam panels can be installed on various surfaces. No tools required. Note: Double-sided tape or adhesive is not included and must be purchased separately. Versatile use: Ideal for improving sound quality on walls in studios, offices, recording studios, control rooms, home studios, home theaters, conference rooms, nurseries, and more. Color: White Material: Polyurethane foam Size: 30 x 30 x 5 cm Package contents: 12 x Sound-absorbing foam panels Note: Lighting and display differences may cause slight color variations. Measurement tolerance: +/- 1–3 cm.