Marie Van Brittan Brown invented an early Variation of the trendy dwelling security system in 1966 with the assistance of her partner, Albert. Uncomplicated nonetheless really advanced for its time, Brown's system made usage of peepholes, a shut-circuit camera method, a two-way microphone, and an emergency alarm. Prewiring makes it https://www.fixerhub.com/united-states/beverly-hills/professional-service/the-world-protection-group-inc