B-Stock, Blue Microphones Bluebird SL, condenser mic, transducer type: condenser, pressure gradient; polar patterns: cardioid; frequency response: 20 - 20000 hz; sensitivity: 28.5 mv/pa at 1 khz (1 pa = 94 db spl); output impedance: 50 Ohms; rate load impedance: not less than 1k omh; s/n ratio: 82.3 db-a; power requirement: +48v dc phantom power; hpf: 100hz, 12db per octave; pad: -20db; including shockmount and wooden box; dimensions: 222.5mm x 47.5mm; weight: 455g, B-Stock with full warranty, may have slight traces of use