The buttons on NEOS II, from top to bottom, are:

1. Deep Clean Mode: Brushes teeth for 2 minutes, then switches to brush-and-flush mode after a 5-second vibration reminder.

2. Intensity Adjustment Button: Adjusts the intensity of brushing and flushing, with options for gentle, standard, and strong levels.

3. Quick Floss Mode: Activates the brush-and-flush mode directly.