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Features: Mic type: 9mm x 7mm Impedance: maximum2.2k Sensitivity: -58dB ?2dB (0dB=1V/pa) Directivity: omnidirectional S/N ratio: more than 60dB Sensitivity reduction: within-3dB at 1.5V Mic frequency range: 30Hz-16,000Hz Speaker: 40mm Sensitivity: 108dB S.P.L at 1kHz Spk frequency response: 20Hz - 20,000Hz Impedance: 32 Rated power: 100mV Power capability: 1000mV Cord length: about 2.5m Plug type: 3.5mm stereo Keywords: [computer keyboard, keyboard windows,vista optical keyboard, keyboard computer, computer cases, pc computer cases,38c case pc, pc headphones, computer headphones, mp3 earphones, cameras, pc camera, usb pc camera, pc security camera, small pc camera, pc video camera, computer camera, computer security camera, web cameras, web video camera Earphone & Headphone, Mobile Phone Accessories, Network Communications, Telephones & Parts, Wireless Phone/Radio & System usb card reader, usb card reader writer, usb 2.0 card reader, memory card reader, sd card reader, multimedia card reader, cf card reader, secure digital card reader, mmc card reader sony laptops, notebook computer, ibm laptops, notebook, computer mouse, mouse, laptop hard drives, computer accessories, notebooks/laptops, second hand, mobile phone accessories, laptop deals wireless modem, wireless 56k modem, wireless cable modem, 56k modem, hsp modem, wireless internet modem, wireless laptop modem, laptop wireless modem, wireles modem]