Description: All palstic injection molding, high quality, beautiful, durable. Easy to install, convenient disassembly. Using excellent raw materials, the power consumption is lower. Replacement accessories fit for most noise cancelling headphone. It is convenient for everyone to use their own headset on the plane to eliminate noise from the plane! Specification: Material: Plastic Size: 40 x 40 x 11 mm/ 1.57 x 1.57 x 0.43 inch Package Includes: 1 Piece Aireplane Jack Adapter Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor