The Rattler can be placed up to 2000 ft away from the tattletale base unit depending on the objects and structures between the Rattler and the base unit. The Rattler is sensitive to movement and vibration. The Rattler unit can be placed on top of the item(s) to be protected. It can also be attached to any metal object with the integrated magnets. For example: on top of a stack of lumber, drywall or other building materials, on the engine cowling of a backhoe, on top of appliances or HVAC units prior to installation. When the tattletale? alarm unit is armed the Rattler will detect any movement or vibration and create an alarm condition.