the number of adults and children living at the location where the alarm will be installed whether the location is a home, apartment or business name and telephone number for friends or family you would like to be contracted in the event of an alarm information such as your “safe word” ...
HF burglar alarm system - uses transmitter for HF signals reflected within room and received for phase amplitude comparisonA h.f. detector system is used to provide protection against intruders and has high range coupled with insensitivity to disturbances. The sender-receiver within an area to be ...