Inthe sleepmode the activity, movement aswell as duration of sleep are recorded.
You'll find more options of evaluation in the VitaDock+ app.
1. During sleep, you also have to wear the tracker on your wrist.
2. To activate the sleepmode, press and hold the button for about 3sec. The device vibrates to confirm.
3. If you are in sleepmode, there will be a little moon in the upper right corner of the screen, as in this picture:
4. To end the sleepmode, press and hold the button for another 3sec. The device also vibrates to confirm.