This is ProStereo

A side-line brand of i.Tech®, ProStereo™ follows three essential design principles: to be professional, enjoyable and innovative. It enables users to relish wonderful music at any time and any place, whilst making music part of daily life. Since 2016, ProStereo™ has launched a chain of high-resolution audio products, and has made an excellent name for itself in the industry. In view of this, ProStereo™ will wear a new look from 2017 onwards, with the goal to provide music lovers with professional as well as diverse mobile audio products.

Note: ProStereo™ is a brand held by i.Tech Dynamic Global Distribution Ltd