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      1. Use of super-type sensor package. 
2. Side of the sensor as a whole shift, so to avoid the interference of the maintransmission parts. 
3. Suitable for the detection of food, toys, etc., the sensitivity of iron and non-iron can be adjusted separately, and it can detect materials such as iron, aluminum,stainless steel, etc. 
4.  Road light-emitting diode display, respectively, the size iron and non-ferrous signal, easy intuitive 
  
	   
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