The Detex Reliant Plus Incident Book with 12 iButtons is used by guards to indicate that something occurred during their patrol. It can be anything from finding a door ajar, shutting off a light, or checking equipment.
Each of the 12 tags is embedded in the book and can be labeled with each type of incident. When the guard encounters an incident he just scans the appropriate tag and the date, time and type of incident is recorded in the Reliant Plus Unit.