Marie Van Brittan Brown invented an early Variation of the trendy dwelling security system in 1966 with the assistance of her husband, Albert. Easy but very Innovative for its time, Brown's technique created use of peepholes, a shut-circuit digicam technique, a two-way microphone, and an unexpected emergency alarm. Prewiring can https://www.callupcontact.com/b/businessprofile/The_World_Protection_Group_Inc/8659641