Blue Microphones Yeti - Ultimate USB Mic for professional recording
The Yeti is one of the most advanced and versatile multi-pattern USB microphones available anywhere. Combining three capsules and four different pattern settings, the Yeti is an ultimate tool for creating amazing recordings, directly to your computer. With exceptional sound and performance, the Yeti can capture anything with a clarity & ease unheard of in a USB microphone.
The Yeti features Blue's innovative triple capsule array, allowing for recording in stereo or your choice of three unique patterns, including cardioid, omnidirectional, and bidirectional, giving you recording capabilities usually requiring multiple microphones.
The Yeti utilizes a high quality analog-to-digital converter to send incredible audio fidelity directly into your computer, a built-in headphone amplifier for zero-latency monitoring, and simple controls for headphone volume, pattern selection, instant mute, and microphone gain located directly on the microphone. There are no drivers to install - simply plug the Yeti into your PC or Mac, load up your favorite recording software, and record something amazing.
Yeti Technical Specifications:

Power Required/Consumption: 5V 150mA
Sample Rate: 48 kHz
Bit Rate: 16bit
Capsules: 3 Blue-proprietary 14mm condenser capsules
Polar Patterns: Cardioid, Bidirectional, Omnidirectional, Stereo
Frequency Response: 20Hz - 20kHz
Max SPL: 120dB (THD: 0.5% 1kHz)

Impedance:16 ohms
Power Output (RMS): 130 mW
THD: 0.009%
Frequency Response: 15 Hz - 22 kHz
Signal to Noise: 100dB

Dimensions (extended in stand): 4.72" (12cm) x 4.92"(12.5cm) x 11.61"(29.5cm)
Weight (microphone): 1.2 lbs (.55 kg)
Weight (stand): 2.2 lbs (1 kg)

PC: Windows 7, Windows Vista, XP Home Edition or XP Professional
USB 1.1/2.0; 64 MB RAM (minimum)
Macintosh: Mac OSX ( 10.4.11 or higher )
USB 1.1/2.0
64 MB RAM (minimum)