The Shelford Channel is built around Rupert Neve’s first new  transformer-gain, class-A microphone preamplifier in over 40 years, a  “best-of-the-classics” inductor EQ section, a tone-packed diode bridge  compressor, the power of variable Silk saturation, a new dual-tap  transformer output stage, and twice the operating voltage of vintage  designs. The manual is included, but not the original packaging. This item has been tested, but not calibrated. It's a consignment piece and we are selling it "as described". Please contact the shop (541)-343-9482 with any questions you may have. Thanks!