Data Logger

[Orbit]

It can vlf and pi detector !

https://www.youtube.com/watch?v=sLw7Azgxlro

[kt315]

peek peek peek peek peek?

[Orbit]

peek peek peek peek peek?

Step step !
1,2,3,4,5,6,7,8 a row

[kt315]

do you need i give you a link again??
this detector is VLF and PI, its working with PI coil and VLF coil.

esspecially for you. I REPEAT THAT AGAIN http://www.metdet.ru/universal.htm
was released in 2013 year

[lena27]

Data Logger
http://ivansilver.pl/