Stereo Earbud Headset with Poseable Microphone Stereo Earbud Headset w/Mic General Features: Black Poseable ear bud Poseable microphone Designed for left ear Two (2) 3.5 mm jacks (microphone and headset) Single stereo speaker design, perfect for use in office or call centers Headset Technical Specifications: 50 - 20kHz frequency range 32W &#177; 10% impedance 108 &#177; 3 dB output sensitivity