Light weight audio perfection in a compact foldable design In-line microphone + control switch Speaker diameter: 40 mm Articular ear cups Lightweight stashable design Soft lace cable Magnet type: Nd Fe B Frequency Response: 20-20k Hz Impedance: 32 ohms Max input power: 400 m W Cable leght: 1.2 m Plug type: 3.5 mm gold plated