This is a Classic Pro active DI, the CDI-1A. I recently purchased this used and used it indoors 4-5 times, but I am selling it due to various circumstances. The exterior has no noticeable scratches and is in very clean condition. I connected a passive piezo pickup from an acoustic guitar, and the sound was crisp and good. I think it's a well-made DI. This is a sale of the main unit only. Thank you.