Because people in early stages of dementia still retain some cognitive functions, they may legitimately go beyond the alert zones; they may be out of town for a few days, for example, going on vacation with their families. In such situations, the user can turn the monitor system to “travel” status. Under that status, the system will suspend the relevant warning function until the “daily” button is pressed again. The purpose of this option is to avoid error detection and erroneous warnings. But, in “travel” mode, the system still offers photographing and GPS positioning functions to meet a missing event.