Audio-Technica ATR2100-USB Cardioid Dynamic USB/XLR Microphone Handheld dynamic microphone with USB digital output and XLR analog output USB output connects to your computer for digital recording, while the XLR output connects with your sound system conventional microphone input for use in live performance Smooth, extended frequency response ideally suited for podcasting, home studio recording, field recording, voiceover, and on-stage use Built-in headphone jack allows you to directly monitor your microphone output without audible delay Cardioid polar pattern reduces pickup of unwanted sounds from the sides and rear. System requirements- Macintosh MAC OS X, USB 1.0 or 2.0, 64 MB RAM minimum, Windows XP/Vista/Windows 7, USB 1.0 or 2.0, 64 MB RAM minimum