Studio Projects 797 Audio B1 Large Diaphragm Cardioid Condenser Microphone. Professional grade microphone, basically never used and has been sitting in the closet for several years. It has transformerless output and a 3-micron large-diaphragm capsule. Inclues the pictured microphone stand. Also includes an M-Audio MobilePre USB Mobile Preamp for recording to digital (note: I verified that this device powers on but I haven't used it myself).