The mask control system "Mask Control" supports you in complying with the current hygiene regulations. It scans up to 10 people passing by at the same time and checks whether they are wearing a mouth/nose protection. If the system detects a person without a mask, it speaks in a friendly language and asks to comply with the rule. This is additionally supported by a visual indicator (red/green). As a motivation for other persons in the vicinity, a voice output can also be used, such as "Thank you for protecting yourself and others by wearing a mouth/nose covering". The display only works locally, not networked and does not store any data. It is therefore DSGVO compliant.