... .Customer's Logo print is acceptable WJ120225 HEADPHONE SET W/MIC & VOLUME CONTROL- 3 dift. styles, two are molded blister ... is window box packing. All these headphone sets are with mic & volume control, suitable for PC, MP3, MP4, DVD. Specification as ... ,000Hz5.Rated power: 100mW 6.Mic. Unit: 6*5mm dia. Electric condenser.7.Mic. Sensitivity: -58dB±2dB 8.Mic. Impedance: Low9.Frequency Response: 30Hz ...