Ipo uses the technologies inside the modern smartphones in order to send sound feedbacks to blind swimmers. The most of the time, especially during the first years of their careers, blind swimmers tend to hit the floating swimming pool lane dividers with their bodies. This ends to be the main source of distraction and waste of time. The lack of orientation inside the lanes is an important factor for those who want to perform always shorter times during swimming competitions. Ipo is able to correct athlete's direction by sending them sound feedbacks through bone transmission headphones in a totally professional and safe scenario.