EAR-HOOKPHONE SECTION : Speaker : 30mm Sensitivity : 103dB S.P.L at 1KHz Impedance : 32ohm Frequency Response : 20Hz-20,000Hz Rated Power : 15mW Power Capability : 150mW Cable Lengty : Approx.2.5m?.3m Plug Type : 3.5mm Stereo MICROPHONE SECTION Microphone Unit : 6X5mm Dia.Electret condenser Microphone Directivity : Omni Direction Sensitivity : -58dB?dB Impedance : Low Frequency Response : 30Hz to 16,000Hz Standard Operating Voltage : 3V packing list : DESCRIPTION : Ear-hook earset with cool mic & volume control UNIT PACKAGE : blister card PCS /CTN : 80 CTN SIZE(CM) : 67*48*33.8 G.W.(KGS) : 13.1