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This detector is available as "buy now" below $13 with free delivery from China.
It is VLF at 22.8 KHz. PCB is "one side only" so it is as schematic.
Grate for project and experimenting.
It is VLF at 22.8 KHz. PCB is "one side only" so it is as schematic.
Grate for project and experimenting.