H2O LIFE SOURCE iDUO S5, User Manual

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3. When the desired volume indicator is lit,
press on to the volume button for 3 seconds to select that volume.
1. When the Volume Button is pressed, the screen's volume icon will flash
<< Volume setting stage >>
1Level : Button sound 1st 2Level : Button sound 2st
3Level : Button sound 3st 4Level : Button sound 1st + ment 1st
5Level : Button sound 2st + ment 2st (Initial value)
6Level : Button sound 3st + ment 3st
7Level : Button sound 1st + ment 1st + Melody 1st
8Level : Button sound 3st + ment 2st + Melody 2st
9Level : Button sound 3st + ment 3st + Melody 3st
~
Control Volume
2. After choosing the desired Volume, As the button is pressed,
it will switch in the following order, (1 ~ 9 )