Stereo headset 1 . Adopt new environmental ABS/PP material 2 . Pass CE，FCC，ROHS 3 . Direct factory 4 . High quality with competitive price 5 . Leather with foam earcap, 　comfortable and suitable for long time wear 6 . OEM also welcome 　 Specification Speaker Φ40mm Impedance 32Ω Sensitivity 108dB Frequencey 20Hz-20KHz Rated power 3mw Power capability 30mw MIC type 6*5mm Directivity omnidirectiomal Sensitivity -58dB±3dB Impedance maximum:2.2KΩ MIC frequency range 30Hz-16KHz Coid length 1.5m±0.15m Plug type 3.5mm Stereo