Posture Feedback is the main feature of the Lumo Lift that will provide feedback for your posture. The Lumo Lift will vibrate when it detects slouching, but the time delay in which it provides the vibration is customizable so that you can tailor your experience to what feels right to you.
To change the delay in the Lumo Lift app, go to Settings > Posture Feedback. The time delay options are anywhere between 3 seconds to 2 minutes.
A shorter delay like 3 seconds will feel like an intense training session for your posture, while a longer delay like 2 minutes will be more of a posture reminder.