PIONEER Enclosed Dynamic Headphones SE-M521 Type: Enclosed dynamic / Driver diameter: 40 mm Frequency response: 	7 Hz to 40 kHz / Impedance: 32 Max. input power: 1200 mW / Sensitivity: 97 dB Plug: Goldplated 3.5mm stereo mini-plug / Cord length: 3.5m Accessories: 6.3 mm stereo standard plug adapter (gold plated)