Sound Tech GN-USB-2 18 Inch Professional Uni-Direction Noise Canceling Gooseneck Stereo Microphone with 10 FT USB Cord The GN-USB-2 gooseneck is specially designed for professional voice communications. The GN-USB-2 is compatible for applications such as Hands-free dictation, PC recording software, voice recognition and internet chat. Features: Plug n Play, Noise cancelling, On/Off LED indicator, Detachable USB A~B cable, 16 inch adjustable neck, Weight base with non-skid rubber mounts Specifications: Element: fixed-charge back plate, permanently polarized condenser, Polar Pattern: Hypercardioid, Sensitivity: -40 +/- 2dB(0dB=1V/Pa at 1KHz), Frequency Response: 40Hz~16KHz, Output Impedance: 75-Ohm +/- 30% Max Input S.P.L.: 138dB, Signal/Noise Ratio: 65dB, Output Connector: USB A~B. Power Supply: Phantom Power 3V DC Operating Systems: Microsoft Windows 2000, Windows XP, Windows 7 and Windows 8 , Apple Mac Os9 and all OX X variations