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Review on Prototek FTP-8 512Hz Frequency Flushable Sonde - Pack of 3 - Ideal for Locating Cast Iron and Non-Metallic Underground Pipes by Fredrick Edwards

Revainrating 5 out of 5

Can find 12 feet underground.

These little guys are amazing and I can see them up to 12 feet underground. When I can't use the steward's scope because I'm binding a flare to my scope. I just have to tie it to a fishing line and send it to the aquarium. The fact that it's waterproof and buoyant makes my life so much easier.

Pros
  • Batteries not replaceable | Button for easy on and off | Battery Life: 4
Cons
  • Nothing