The guide tag indicates the administrator role. This means that the corresponding caritag is intended for the person who acts as a supervisor or guardian (e.g. as a group leader or parent). The follower and valuable tags are the counterparts. The follower tag is issued to group members, children, etc. and the valuable tag can be placed in an instrument case, for example, in order to be able to localise the location of the respective follower and valuable tags if necessary. There are two different security zones in the interaction of the three tag types, which can be configured individually. If a follower or valuable tag leaves a security zone, an alarm can be sent to the guide tag.