This is a Demo item because it was used as a display at NAMM, so it is being sold at a reduced price. Most items come with their original boxes, with the exceptions of rack gear and stands. If any blemishes are found, it will be added to the description later or disclosed before shipping, but most items are in like new condition.
The SC290 can convert a digital S/PDIF RCA or optical stereo signal to analog RCA, and can convert a stereo analog RCA signal to Digital S/PDIF RCA or optical. Powered by DC 5v.