Phantom-powered plug-in DI Convenient to carry, it allows direct input from instruments to mixers or audio interfaces. It doesn't take up much space, making it ideal for everyday practice, and attaching it to an audio interface or mixer allows you to practice immediately with high-quality sound. If you plug it into a bass amp with a direct out but no DI out, you can get a DI out. Please refer to the DI comparison video by professional bassist Teppei Kawasaki on YouTube. Includes the main unit, case, and instruction manual. The zipper lever on the case is broken, so it's secured with a cable tie. There are no issues with use. I found it very useful for performances in cafes and bars, where there were only mixers and speakers, and no bass amps. Keeping it in your bass case provides peace of mind for recording, etc.