Thoto purchased from two years ago, thirty euros I think. Active di box, check the site for details.
I use it mainly with electric or acoustic guitar with piezo passive or low passive kind pj.
The signal is strong and very clean, there is a big difference in quality with ultra di 100 bebert yet not bad. Breathing sound much, details stand out better, and-15db pad is more practical than-20db of Bebert with some devices (bebert shark 110 among others).
I did not dibox hi end, but this one is the best by far.
Note that I have had problems on a small amp for acoustic guitar, artec d25 I think because its phantom power retailed enough. Bebert on it happening, not this millenium, I have not measured but often found only on the small 15v equipment.
The phase inversion is useful against feedback, the ground lift against hum, etc, good product. There is even the possibility to merge to make a stereo signal on the box, through the expense of course.
Sorry the summary notice, but better than nothing huh. I recommend this pedal for the price it's amazing.