From the invention circuit and found that when installing the device sends a signal that, in-room safety box, when there is a donation to raise donation box magnetic wireless device is used in the installation of the window in accordance with the edge of the door, there is a split.magnetic sticks to more than 1 cm circuit will work LED red lamp lamp on it means circuit sends a signal to the receiver, theft.Use MHz frequency range 315 to 100 meters in the open air and magnetic circuit term is not more than 1 cm even though each step in the process will be reviewed by a problem of the form factor, it can use a scientific approach.as well as the knowledge of science to solve problems that may occur, it can be made of the invention of this invention success.
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