The IP68 waterproof drain camera has a built-in 512 hertz transmitter in the probe tip. The 512hz frequency sonde locator works with any 512hz receiver. The upgraded receiver has two detecting mode. When the 512hz signal is weak, you can choose the far mode (Detecting Distance: 23 feet). When the 512hz signal is strong, you can choose the near mode(Detecting Distance: 13 feet). Also, detachable compact design makes it portable to anywhere you want.
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