When the ADI-250 is not charged in time, it will turn off. 

When you subsequently place it on the charging station, it will not turn itself on again as you would normally do. 

By pressing and holding the red horn button (nr8) for at least 10 seconds, your display will turn on again after being fully charged. You can now use your ADI-250.

Should you have any further questions, you can always contact us via this website.

Please state the question or complaint clearly so that we can serve you well.