This is a high-end DI that was popular about 5-10 years ago. It's still excellent compared to current products, and I think it's a great deal. I'm selling it because I haven't used it recently. The item includes the main unit and the power adapter only. Operation has been confirmed. It's a transformerless DI with a good response, and the sound has a wide range and a dense mid-range. The output is also a buffered output, so it delivers a clear and powerful sound to the bass amp. It's quite different from the Hi-Z input of an audio interface, so it's also recommended for home recording. Bass Bass preamp Bass DI DI Buffer