When you power on your Stethee Pro for the very first time, the default volume is set at mid-range.
Stethee Pro’s volume level can be amplified in 8 increments up to 96X amplification with digital filters (24X with Stethee Pro alone). Increase the volume during listening by holding down and rotating the Control Button Clockwise (CW), or rotate Counter-Clockwise (CCW) to decrease the volume. The volume change by one level can be confirmed by a single auditory confirmation (beep) heard through headphones. A double auditory beep is also heard once the maximum volume is reached.
The volume set within the Stethee Pro Mobile App becomes the default volume level the next time Stethee Pro is powered on.