This Bluebird Mic is fully functional and in good condition. Comes with original box. 

The Blue Bluebird Large Diaphragm Cardioid Condenser Microphone is designed to deliver the same high-quality audio that mic users have come to expect from Blue. Boasting a unique look and highly versatile performance, this pressure gradient cardioid microphone utilizes Blue's renowned mic technology and a Class-A discrete amplifier circuit. The Bluebird microphone can be used in any number of applications, from vocals to guitars, close-miking of drums or drum overheads, percussion, piano, horns, strings, or anywhere else where crystal-clear sound is the top concern. 

Requires phantom power.

• Features
• Frequency response: 20Hz - 20kHz
• Sensitivity: 27mV/Pa
• 138dB max. SPL
• Low self-noise specification (7.5dB)
• High output level (+12cBV)
• Class A discrete amplifier circuit