Unobtrusive activity sensors or report wirelessly to the system located in the residence.
You decide how many sensors to use, and where they will be located. The sensors report constantly to the system, which updates activity data every 15 minutes. If you have particular concerns you can set rules that will notify you when particular conditions are met. Notifications can be by telephone, email and text.
For more specifics about how to set rules and under what conditions, and what the graphs can show, please see the help pages for each sensor type.