07-16-2015, 03:05 PM
Well it's not recommended to use ultrasonic with headphones as it can be difficult to get the volume correct.
Headphones maximize the results though, I use ocean surf through the day on headphones and I noticed when I started doing that my results improved.
Headphones maximize the results though, I use ocean surf through the day on headphones and I noticed when I started doing that my results improved.
