Features: Stylish Headphones with Microphone attachment Comfortable padded headband for extra comfort Adjustable headband for extra comfort 3.5mm Jack Connection for compatibility with standard PC/ Laptop/ Speaker outputs Specifications Driver Unit: & Ouml;40mm Speaker Impedance: 32ohm±15% Speaker Sensitivity: 100d B±3d B Speaker Frequency Response: 20-20, 000 Hz Maximum Power Input: 50mw Microphone Operating Voltage: 4.5V Microphone impedance: 2.2 K Microphone sensitivity: -58d B±2d B Microphone Frequency Response: 30-16, 000 Hz Cord Length: 2.2 metres