PI metal detector (XY-90)

You can use it for:
 - General purpose metal detector 
 - Searching on the beach
 - Searching meteorites

Specifications:  
  - Principle of operation: Pulse Induction (PI)  
  - Mode: dynamic (need motion of the search coil)
  - Detection depth: 20-25 cm for small coin, 27-30 cm for big coin. Larger  objects are detected at a greater distance.  
  - Indication: audio (headphones) and light (LED). The LED is very convenient to work in the dark or under water (without headphones).  
  - Coil: information in the manual
  - Power: 12 V battery 
  - Reverse polarity protection
  - Low battery indicator
  - Consumption: 60-80 mA  
  - PCB size: 99 x 71 mm

Controls:  
  - Potentiometer "Delay"  
  - Potentiometer "Threshold"