This is a high-end Darkglass effects pedal. It's a professional-use item praised for improving sound just by running your signal through it. It also has a headphone jack, so you can practice with just this one unit. The main features are the five central graphic equalizers (the knobs on the left and right control master volume and the steepness of the equalization). You might think it's not much, but it's surprisingly sufficient. Furthermore, there are "bite" and "growl" buttons on the left and right for fine-tuning the sound. The main selling point is that it has two types of distortion! However, the characters aren't that different, and you can mix them without any problems. You can use the knobs to mix A, which focuses on the mid-range, and B, which has a scooped sound. The sound character is for those who don't like the hysteria of the MXR BASS DI+ or BOSS ODB, it's a rough, gritty type, and it's a bit similar to the DOD GRUNGE (in my opinion). It's also recommended for guitarists who want to create a unique sound that no one else has. It also has a clean mix, so there's no compromise. Even if you use a multi-effects unit, it's a good idea to connect this at the beginning or end of your signal chain. The box and other accessories are all included. The box is excellent, with magnets that close it automatically.