The Rattler is sensitive to 6˚ of movement or rotation. Place the Rattler on top of any item to detect movement, or use its attached magnets for any usage on metal. The Rattler is completely tamper proof. If The Rattler is tampered with while armed it will send out a signal every time. Setting up The Rattler is easy and instant, and can be paired with your tattletale base unit at any time. The Rattler is extremely durable and weather resistant perfect for both indoor and outdoor use.