Hi, there are several devices with USB B for laptops (e.g. Radial USB Pro), but i think it's the first product which allows you to connect smartphone directly XLR acitve speakers. I use with Galaxy S20 connected to Adam T8V, RCF Ayra 8 and typical PA RCF TT-08. Works powered by smartphone, no additional power supply needed. Sounds great, build sturdy - i like it. Unika seems to be interesting manufacturer.