To adjust the Session duration:
On a Mac go to the emWave PRO or emWave2 drop menu, select Preferences, and adjust the Session Length as desired.
On a PC go to the menu item Edit then select Preferences and select the number of minutes you would like for your Session Length.
The maximum and default session time is 60 minutes.
However, it's important to realize your goal.
Your goal is to be able to use the learned HeartMath techniques and get into a better coherence level at will, without being connected to any devices.
The best way to do that is to practice short sessions so that your body learns how to get into coherence.
We recommend 5 or 10 min. sessions.
Your body will find coherence to be an optimum state and cooperate with you very quickly as you practice.