... can scare away thieves or to remind the owners pay attention to the movements of bearer.2.If there is slight vibration ... time.3.This product can be directly linked to the need for security of the location, such as vehicles \ safe, etc. ... the body, the other is the sensor. You can install the body on one side of the door, and the sensor on the other side of the door.Put the switch “on”, when you open the ...