... HEADPHONE SET W/MIC & VOLUME CONTROL- 3 dift. styles, two are molded blister card packing, one is window box packing. All these headphone sets are with mic & volume control, suitable for ... power: 100mW 6.Mic. Unit: 6*5mm dia. Electric condenser.7.Mic. Sensitivity: -58dB±2dB 8.Mic. Impedance: Low9.Frequency ... 3.25 cuft.)Q’ty: 20,000 sets HEADPHONE SET W/MIC & VOLUME CONTROL for computer, MP3, DVD,...