BeHear SMARTO supports three different volume ranges (Low, Mid, and High) so that the maximum volume can be set based on the user's personal hearing ability. Gain is limited to the maximum volume in the selected range. The default range is "Mid".
To change the maximum volume level:
Press and hold the + and - buttons simultaneously for more than 5 seconds. The sound level indicator will show the current level. ﻿﻿Release the + and - buttons and then hold them again to scroll between the maximum volume ranges.