Marie Van Brittan Brown invented an early Edition of the trendy property security method in 1966 with the assistance of her husband, Albert. Very simple but really Innovative for its time, Brown's program built utilization of peepholes, a shut-circuit digital camera system, a two-way microphone, and an unexpected emergency alarm. https://sicherheitsdienste66531.bcbloggers.com/26754266/indicators-on-brandwachen-you-should-know