Overview: Ideal for portable steroes, boomboxes, portable cassette players & CD players, mp 3 players Lightweight & portable Convenienct to use Comfort soft pad design Specifications: Impedance: 32 ohms ± 15% Driver Unit Diameter: 40mm Sensitivity: 108 d B ± 3 d B at 1 K Hz RMS: 20 m W Maximum Input: 200 m W Frequency Response: 20-20, 000 Hz Plug: Nickel Plated 3.5mm Cord Length: 0.95M /-0.05 M Dimensions: 0 in x 0 in x 0 in Weight: 3.03